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: You can upload a video to YouTube Studio and use its "Automatically generated subtitles" feature to view and copy the text. 2. Adding Text to an MP4 Video
If you are looking for a way to read text while being recorded (appearing to look at the camera): Randimp4
If you need to get the spoken word or dialogue out of an MP4 file, you can use AI-powered transcription tools. : You can upload a video to YouTube