Hi /sci/, I will have some free time these days since my uni will stay closed for a couple of weeks, so I was thinking in creating a YouTube channel and upload some solved exercises there (physics and math mostly). There are basically no videos of exercises of my university on YouTube and since is a really big university I think some people would appreciate the content. I only have a shitty microphone but I'm not planning on becoming a youtuber or something like that just wanted to do upload some content that some people would appreciate. I wanted to ask you which kind of videos of people solving exercise do you find more helpful. And if you have any suggestions they would be really appreciated. Besides, English is not my first language, do you recommend to add subtitles to my video just in case? Sorry for the low quality thread but I think in /adv/ they won't be able to answer me.

Also post your favorite mathematical proof.