I wish it was just for showing videos, but every aspect of the user interface
past the login/homepage is Flash. The only way to even get into the
classes/send messages/anything would be having to use the Flash-based
interface. It was made using the open source Adobe Flex framework, but none
of the FOSS players are able to render it (Lightspark and Gnash are the ones
I know of and have tried).
I was told that they'd be working on an non-Flash based version, but that
isn't until later (I was told about late 2012 or early 2013). I'll probably
have graduated by the time that they actually do make the switch.
I've nearly been able to give up all the proprietary software I've used, but
this is the one thing holding me back from being completely free.