Look on the Mac OS 8 CD for a music video by Barenaked Ladies. It's a Cinepak, 400x256 or some such size. I use it to show off pretty decent-looking full screen video running smoothly on a 68K Mac. You need at least a 33 MHz '030 or 25 MHz '040 for it to run well though. I'm not sure if an FPU helps or not. If the Mac can run at 800x600, switch to that mode first (assuming you have Thousands at that mode) if running full screen so the scaler can perform a much-easier 2x scale rather than a harder 1.3333 scale.

Copy it to the hard drive for the best performance.

Also look on an old AOL 3.0 CD for a 1 minute Cinepak commercial for AOL. It's in 320x240 format and runs on a 25 MHz '030 pretty well, and it scales perfectly to 640x480 so full screen is easier for this video.

Color Classic with a stock board is too slow to play the AOL commercial satisfactorily, so you would want at least an LC 520 board in there. 640x480 hack is nice for 2x scaling but not required.