Shouldn't be too difficult to implement, but I thought it'd be nice to have access to HTML code and commands within our Video descriptions. It's already enabled on our profiles.
It'd be real nice to have stuff like the "bold" command (<B>) to point out things of importance like spoilers or things that might help reviewers (like something you really want them to know before watching) and also to be able to include links to things like inspirations, pictures used, etc. I know you could put the link anyway, but having the "blue" tags and so on would really draw attention.
I hope my assumptions that it wouldn't be that difficult to implment are correct and I think it'd be something pretty useful. I for one write very long video descriptions and would love to highlight key points.

