You used MAME 0.251 to show what's been happening & it's a good job to as MAME 0.252 has had some big updates that still need ironing out. Its nice to see a video & commentary of MAME's progress & I do hope you do more in the future. I do think that MAME should adopt Multiple Amusements Machines Emulator now that it emulates more than just arcade games.
I would also love to see a video & commentary from day 1 of MAME obviously it would need quite a few episodes of each year thereafter.