move config to variables and secrets (3)

main.py

@@ -24,10 +24,10 @@ class MP4Video(BaseModel):
         return self.video_file.file
 
     @field_validator('video_file')
-    def validate_video_file(cls, v):
-        if not v.filename.endswith('.mp4'):
+    def validate_video_file(cls, self):
+        if not self.filename.endswith('.mp4'):
             raise HTTPException(status_code=500, detail='Invalid video file type. Please upload an MP4 file.')
-        return v
+        return self
 
 class SRTFile(BaseModel):
     srt_file: Optional[UploadFile] = None
@@ -43,10 +43,10 @@ class SRTFile(BaseModel):
         return self.srt_file.size
 
     @field_validator('srt_file')
-    def validate_srt_file(cls, v):
-        if v.size > 0 and not v.filename.endswith('.srt'):
+    def validate_srt_file(cls, self):
+        if self.size > 0 and not self.filename.endswith('.srt'):
             raise HTTPException(status_code=422, detail='Invalid subtitle file type. Please upload an SRT file.')
-        return v
+        return self
 
 @app.get("/")
 async def root():