Yeah sure, react-bootstrap has all the normal bootstrap classes so as long as you theme it right you'll be sorted.

I think one of the reasons http://www.webplatform.org/ was setup was for this?

Any reason why the aspect ratio is off?

Yea, I'm stretching the remote video element. We could use a designer's help to pretty this app up. The code is on GitHub at https://github.com/twelephone/rtcroulette

Just fixed the stretch issue.