He made no mention of the missing deadfront on the panel, which appears to have been missing for some time.
He broke out the chisel, instead of trying to free the recp by wiggling the bottom of the yoke, and caused the beginning of the plaster damage.
Despite describing every other step in detail, he just jumped to the box being removed. It looks like he took it out with a hammer. More plaster damage.
If he had used a sawzall with a fine metal cutting blade, there would be much less damage.
He twists the grounds together incessantly & needlessly.
Didn't even mention the need for GFCIs in the kitchen.
Most houses of that era (late 50's to early 60's) have a #16 ground run in the romex to the circuits that need grounding. (I believe the video maker is in CA, from the looks of the service). That might not be the best choice of houses to make a how to video.
The patching plaster is still shiny wet when he called the job finished. No sanding necessary