If you're new to C1 then the videos over at LL are definitely worth a watch - though they're a bit light weight in places (the B&W one for example, which is more of a discussion of the merits of B&W photography than an actual hands-on-how-to-do-the-conversion in C1).
Capture-U? I joined it a few months back...to be honest it's been a bit of a disappointment...maybe my expectations were wrong...very, very few videos...the documentation available seems more like the bullet pointed notes of a series of lessons...and the blog and news pages haven't changed in months.
Don't get me wrong - Capture U provides lots of information, but unless you print each web page you'll be reduced to reading it all online - which perhaps, given the online tests you're meant to take, is the point. Doesn't work for me though.