Marketcap does not tell the entire story. Most of it is based upon publicity which may, or may not, be applicable.
EOS had a lot of hype, raised a bunch of money, and has Dan Larimer which instills faith in it. Plus, there is a lot of development going on.
That equates to a high token price, not necessarily to an experience users will flock to.
3speak is another video platform on Steem.