Fantastic results, and awesome video. I'm really impressed how many parts of your chip you got working (or mostly working in the case of the video generator), despite the clock tree issues.
I'd certainly be interested to see more detail on the steps you took to bring it up (under voltage, under clocking, etc) if you do decide to make a second part. If nothing else others with MPW-1 chips they want to try to bring up might appreciate a "try starting here" range of voltages/clock speeds that might let them too get "first signs of life" out.