diff --git a/modules/__init__.py b/modules/__init__.py
new file mode 100644
index 0000000..6a1a846
--- /dev/null
+++ b/modules/__init__.py
@@ -0,0 +1,4 @@
+from .sst import SST
+from .tts import TTS
+from .translate import Translate
+from .video import Video
\ No newline at end of file
diff --git a/modules/sst.py b/modules/sst.py
new file mode 100644
index 0000000..e78f91c
--- /dev/null
+++ b/modules/sst.py
@@ -0,0 +1,80 @@
+import wave
+from vosk import Model, KaldiRecognizer, SetLogLevel
+from moviepy.editor import VideoFileClip
+import tempfile
+import os
+import webrtcvad 
+
+class SST:
+    def __init__(self, model_path, lang="en-us"):
+        SetLogLevel(0)
+        self.model = Model(lang=lang, model_path=model_path)
+        self.recognizer = KaldiRecognizer(self.model, 16000)
+        self.recognizer.SetWords(True)
+        self.recognizer.SetPartialWords(True)
+
+    def process_audio_with_timing(self, audio_path):
+        with wave.open(audio_path, "rb") as wf:
+            if wf.getnchannels() != 1 or wf.getsampwidth() != 2 or wf.getcomptype() != "NONE":
+                raise ValueError("Audio file must be WAV format mono PCM.")
+
+            vad_timing = []
+            in_speech = False
+            while True:
+                data = wf.readframes(4000)
+                if len(data) == 0:
+                    break
+
+                is_speech = self.vad.is_speech(data, sample_rate=wf.getframerate())
+                if is_speech and not in_speech:
+                    vad_timing.append(wf.tell() / wf.getframerate())
+                elif not is_speech and in_speech:
+                    vad_timing.append(wf.tell() / wf.getframerate())
+
+                in_speech = is_speech
+
+                if self.recognizer.AcceptWaveform(data):
+                    result = self.recognizer.Result()
+                    print(result)
+
+
+                else:
+                    partial_result = self.recognizer.PartialResult()
+                    print(partial_result)
+
+            final_result = self.recognizer.FinalResult()
+            print(final_result)
+
+
+            return final_result, vad_timing
+
+    def process_video(self, video_path):
+
+        audio_tempfile = tempfile.NamedTemporaryFile(suffix=".wav", delete=False)
+        with VideoFileClip(video_path) as video:
+            audio = video.audio
+            audio.write_audiofile(audio_tempfile.name)
+
+        result = self.process_audio(audio_tempfile.name)
+
+        os.remove(audio_tempfile.name)
+
+        return result
+    
+    def _extract_audio_from_video(self, video_path):
+        audio_tempfile = tempfile.NamedTemporaryFile(suffix=".wav", delete=False)
+        with VideoFileClip(video_path) as video:
+            audio = video.audio
+            audio.write_audiofile(audio_tempfile.name)
+        return audio_tempfile.name
+
+    def _cleanup_temp_file(self, file_path):
+        os.remove(file_path)
+
+    def set_model_language(self, lang):
+        self.model.set_string('lang', lang)
+
+    def set_recognizer_params(self, sample_rate=16000, words=True, partial_words=True):
+        self.recognizer.SetSampleRate(sample_rate)
+        self.recognizer.SetWords(words)
+        self.recognizer.SetPartialWords(partial_words)
\ No newline at end of file
diff --git a/modules/translate.py b/modules/translate.py
new file mode 100644
index 0000000..c8b5c0e
--- /dev/null
+++ b/modules/translate.py
@@ -0,0 +1,45 @@
+import aiohttp
+import json
+from langdetect import detect
+import re
+
+class Translate:
+    def __init__(self, api_url="https://libretranslate.com/translate"):
+        self.api_url = api_url
+
+    async def translate_text(self, text, source_lang, target_lang="ru"):
+        params = {
+            'q': text,
+            'source': source_lang,
+            'target': target_lang,
+        }
+
+        async with aiohttp.ClientSession() as session:
+            async with session.get(self.api_url, params=params) as response:
+                data = await response.text()
+
+        translation = json.loads(data)[0]['translatedText']
+        return translation
+
+    async def preprocess_text(self, text):
+        text = re.sub(r'\s+', ' ', text)  # Remove extra spaces
+        text = re.sub(r'[^A-Za-z0-9А-Яа-я\s]', '', text)  # Remove special characters
+        return text
+
+    async def postprocess_text(self, text):
+        return f"[Translated]: {text}"
+
+    async def batch_translate_text(self, text_list, source_lang, target_lang="ru"):
+        translations = []
+
+        for text in text_list:
+            preprocessed_text = self.preprocess_text(text)
+            translated_text = await self.translate_text(preprocessed_text, source_lang, target_lang)
+            postprocessed_text = self.postprocess_text(translated_text)
+            translations.append(postprocessed_text)
+
+        return translations
+
+    async def detect_language(self, text):
+        detected_lang = detect(text)
+        return detected_lang
diff --git a/modules/tts.py b/modules/tts.py
new file mode 100644
index 0000000..45e3c72
--- /dev/null
+++ b/modules/tts.py
@@ -0,0 +1,43 @@
+from vosk_tts import Model, Synth
+import os
+from moviepy.editor import AudioFileClip
+
+class TTS:
+    def __init__(self, model_name="vosk-model-tts-ru-0.4-multi"):
+        self.model = Model(model_name=model_name)
+        self.synth = Synth(self.model)
+
+    def text_to_speech(self, text, output_path, speaker_id=1):
+        self.synth.synth(text, output_path, speaker_id)
+
+    def batch_text_to_speech(self, text_list, output_folder):
+        for text, speaker_id in text_list:
+            output_path = f"{output_folder}/output_{speaker_id}.wav"
+            self.text_to_speech(text, output_path, speaker_id)
+
+    @staticmethod
+    def create_text_speaker_tuples(final_result, vad_timing):
+        text_speaker_tuples = []
+        current_speaker_id = 1
+
+        for start, end in zip(vad_timing[::2], vad_timing[1::2]):
+            text_speaker_tuples.append((final_result, current_speaker_id))
+            current_speaker_id = 4 if current_speaker_id == 1 else 1
+
+        return text_speaker_tuples
+
+    @staticmethod
+    def create_output_folder(folder_name):
+        os.makedirs(folder_name, exist_ok=True)
+
+    def set_model(self, model_name):
+        self.model.set_string('model_name', model_name)
+        self.synth = Synth(self.model)
+
+    def change_speaker_id(self, text_speaker_tuples, new_speaker_id):
+        return [(text, new_speaker_id) for text, _ in text_speaker_tuples]
+
+    def combine_audio_files(self, audio_paths, output_path):
+        clips = [AudioFileClip(audio_path) for audio_path in audio_paths]
+        combined_clip = concatenate_audioclips(clips)
+        combined_clip.write_audiofile(output_path)
\ No newline at end of file
diff --git a/modules/video.py b/modules/video.py
new file mode 100644
index 0000000..94f7082
--- /dev/null
+++ b/modules/video.py
@@ -0,0 +1,76 @@
+import os
+import subprocess
+from moviepy.editor import VideoFileClip, AudioFileClip, AudioArrayClip
+from moviepy.editor import concatenate_videoclips
+import numpy as np
+
+class Video:
+    def __init__(self):
+        pass
+
+    async def download_video_from_url(self, video_url, output_path):
+        # Download a video from a given URL and save it to the specified output path
+        # Note: You may use a library like youtube_dl for more advanced video downloading
+        command = ["ffmpeg", "-i", video_url, "-c", "copy", output_path]
+        subprocess.run(command)
+
+    async def load_video_from_path(self, video_path):
+        # Load a video from the specified file path using moviepy
+        return VideoFileClip(video_path)
+
+    async def replace_audio_in_range(self, video_clip, audio_path, start_time, end_time):
+
+        original_audio = video_clip.audio
+
+        new_audio_clip = AudioFileClip(audio_path)
+
+        new_audio_clip = new_audio_clip.subclip(start_time, end_time)
+
+        original_duration = original_audio.duration
+
+        if end_time > original_duration:
+            silence_duration = end_time - original_duration
+            silence = AudioArrayClip(np.zeros(int(silence_duration * original_audio.fps)),
+                                     fps=original_audio.fps)
+            new_audio_clip = self.concatenate_audioclips([new_audio_clip, silence])
+
+        final_audio_clip = self.concatenate_audioclips([
+            original_audio.subclip(0, start_time),
+            new_audio_clip,
+            original_audio.subclip(end_time, original_duration)
+        ])
+
+        video_clip = video_clip.set_audio(final_audio_clip)
+
+        return video_clip
+
+    @staticmethod
+    async def save_video(video_clip, output_path):
+        video_clip.write_videofile(output_path, codec="libx264", audio_codec="aac")
+
+    @staticmethod
+    async def get_video_duration(video_clip):
+        return video_clip.duration
+
+
+    @staticmethod
+    async def create_output_folder(folder_name):
+        os.makedirs(folder_name, exist_ok=True)
+    
+    async def concatenate_video_clips(self, video_clips):
+        # Concatenate a list of video clips into a single clip
+
+        # Make sure the list is not empty
+        if not video_clips:
+            raise ValueError("Empty list of video clips")
+
+        # Check if all clips have the same resolution and fps
+        first_clip = video_clips[0]
+        for clip in video_clips[1:]:
+            if clip.size != first_clip.size or clip.fps != first_clip.fps:
+                raise ValueError("All video clips must have the same resolution and fps for concatenation")
+
+        # Concatenate the clips
+        concatenated_clip = concatenate_videoclips(video_clips)
+
+        return concatenated_clip
\ No newline at end of file
diff --git a/start.py b/start.py
new file mode 100644
index 0000000..4805ba4
--- /dev/null
+++ b/start.py
@@ -0,0 +1,57 @@
+from fastapi import FastAPI, File, UploadFile
+from fastapi.responses import FileResponse
+from modules import SST
+from modules import TTS
+from modules import Translate
+from modules import Video
+import os
+import shutil
+
+app = FastAPI()
+
+UPLOAD_FOLDER = "uploads"
+OUTPUT_FOLDER = "output"
+AUDIO_FOLDER = "audio"
+VIDEO_FOLDER = "video"
+
+os.makedirs(UPLOAD_FOLDER, exist_ok=True)
+os.makedirs(OUTPUT_FOLDER, exist_ok=True)
+os.makedirs(AUDIO_FOLDER, exist_ok=True)
+os.makedirs(VIDEO_FOLDER, exist_ok=True)
+
+sst = SST()
+tts = TTS()
+translator = Translate()
+video_manager = Video()
+
+@app.post("/process_video/")
+async def process_video(video_file: UploadFile = File(...)):
+    video_path = os.path.join(UPLOAD_FOLDER, video_file.filename)
+    with open(video_path, "wb") as video:
+        video.write(video_file.file.read())
+
+    audio_output_path = os.path.join(AUDIO_FOLDER, f"{os.path.splitext(video_file.filename)[0]}.wav")
+    await video_manager.extract_audio(video_path, audio_output_path)
+
+    final_result, vad_timing = await sst.process_audio_with_timing(audio_output_path)
+
+    translated_text = await translator.translate_text(final_result, source_lang="en", target_lang="ru")
+
+    text_speaker_tuples = [(translated_text, 1)]
+    await tts.batch_text_to_speech(text_speaker_tuples, output_folder=OUTPUT_FOLDER)
+
+    output_video_path = os.path.join(VIDEO_FOLDER, f"{os.path.splitext(video_file.filename)[0]}_processed.mp4")
+    video_clip = await video_manager.load_video_from_path(video_path)
+    for start, end in zip(vad_timing[::2], vad_timing[1::2]):
+        await video_manager.replace_audio_in_range(video_clip, os.path.join(OUTPUT_FOLDER, "output_1.wav"), start, end)
+
+    await video_manager.save_video(video_clip, output_video_path)
+
+    shutil.rmtree(UPLOAD_FOLDER)
+    os.makedirs(UPLOAD_FOLDER, exist_ok=True)
+    shutil.rmtree(AUDIO_FOLDER)
+    os.makedirs(AUDIO_FOLDER, exist_ok=True)
+    shutil.rmtree(OUTPUT_FOLDER)
+    os.makedirs(OUTPUT_FOLDER, exist_ok=True)
+
+    return FileResponse(output_video_path, media_type="video/mp4", filename=output_video_path)
diff --git a/templates/root.html b/templates/root.html
new file mode 100644
index 0000000..e69de29