You can hear the commentary, but the proper nouns are hard to catch. You want to convey what is happening even in places where you cannot play sound. In such cases, you can start by adding subtitles ...

I used this free app to batch-generate subtitles for an entire folder of videos locally, without sending the files to the ...

That being said, Twitter can reject your file with a less-than-helpful message of: "There was a problem uploading your subtitle (.srt) file." So it's important, at least when you first start, to ...