The design has a lot of moving parts. I clicked on a mainpage link and then play and it stated "loading". After a minute or so, I noticed some pulsing green concentric circles. A few seconds later I saw there was some text telling me to log in. So I tried. Ooops no account. So I signup. I get a server error. Back out and refresh the main page. Go to signup link. Fill out form again. Failure because the email address already in use. So I login, select a video, push play, and wait. Nothing plays after a minute. I try using the back button for my browser. It's been broken by the website. Close tab.
I still don't know what the site actually does. I recommend simplifying the demonstration down to the core obvious functionality and creating a clear call to action using small steps for the user.
Think about it as having a novice level and an expert level. New users start at the novice level, experts approaching the understanding of the development team will benefit from information that overwhelms the novice user.
Good luck.
EDIT: It sounds interesting to delay some information to users once they get used to the website. Great insight!