The music goes round and round, and it comes out the stereo speakers. How?
Start with a MacBook Pro (sitting on the left speaker in this photo, but usually on a shelf behind the TV). It has a DVI to HDMI cable to send video to the TV, and an audio lead from the headphone outlet to the TV. Then cables go from the audio out on the TV to a spare input on the stereo. Now we can play the video clips I've downloaded from YouTube and other web sites. It's a bit of a pain to keep getting up to start the next song, but I don't plan to do a great amount of that.
This setup will be used more to view movies that have accidentally fallen off the internet onto my hard drive. Last night we watched the original 1970 M*A*S*H movie, which has kept its charm, though it was rather episodic, without much of a story line. No wonder it made such a good TV show, it was already a series of brief stories and jokes.