I'm also gonna tell the truth, bongwater is a douchebag, actually your website is apparently pretty doing what it is supposed to do, keeping a KISS approach in a project is a good idea.

How you can improve?

You can give it a better look...

A way to check balance that doesn't require the page to reload.

History of videos watched and BTC earned, by session, all time...

Credit notification when video is watched.

But this is secondary stuff, a fair share for video watched and payment made is the important part.