Youtube
It's way inconvenient that we can't post links to Youtube, but that's life. In addition to reiterating my recommendation of a video you find by searching Battlestar + Dollhouse, I'd like to say that the Doctor Who Proms videos and Final Fantasy XIII & Final Fantasy Versus XIII soundtrack videos are great, for anyone who is interested. Especially the Sunleth Waterscape, it puts me in a cheery mood, and No Tears to Waste.