I just noticed youtube video embeds here on steemit do not auto-adjust the video width, so you cannot see the whole video on small mobile device screens. I can't even get to the lower right corner of the video to at least switch to full screen mode. 

I know this can be remedied, I've done it for a few webmastering jobs here and there...but I'm on my phone ATM, otherwise I'd post the snippet I used. I think you use a CSS class with width 100% and height auto, but I may be mistaken.