If this is a known show (like the Netflix series Maid ), you don't need to transcribe it yourself:
You can upload the file to services like Otter.ai , Descript , or use YouTube's private upload feature to generate automatic captions. maid.mkv.mp4
If you can (if your interface allows) or paste a snippet of the audio/dialogue , I can format and refine the text for you immediately. If this is a known show (like the