I just located a couple of vintage Rush music videos on YouTube, courtesy fredhoffman1968. The first is an early performance from 1975 on Don Kirshner's Rock Concert TV show where the band performs In the Mood and Finding My Way. You can watch it here. They also performed Best I Can during that performance, which can be seen here.
The second video is a real treat. It's an in-studio performance of Xanadu from 1977 which you can check out here.
