What do you do to make your videos accessible?

I'd never considered accessibility when making any of my other videos, but today it occurred to me that's kind of bad. In my real life, I'm a teacher who cares passionately about making the world more accessible, but I haven't bothered to actually apply it outside of the classroom. A quick google has brought up a couple of things, but I'd be really happy to hear any more tips for things you do.

1. Edit the CC or manually add them. I already do this, but in Spanish because my videos are filmed in Chile but I am English and speak English on camera. I think correcting the auto-captions is probably more accessible for anyone who wants a language other than Spanish.

2. Audio description for the visually impaired. I've never done this, but I think I will in future. I use b-roll quite a lot, so I think this could be relevant for me.

3. Avoid flashing lights or strobe-light-effect. I make videos about cleaning the beach, so I don't know if this is super relevant for me.