Please add subtitles to videos

Hello Steemians, glad to be here in this space! I've been reading some of y'all's stories, and there's one thing I'd really appreciate seeing:

When you post videos, add subtitles.

I have been studying this site while I'm at work, and I can't turn the speakers up. Having subtitles on videos would be a big help . . . and may get you upvoted! Thank you.