Interesting but it raises the question of what the effects of removing those snap packages are? I note that he doesn't mention installing anything to replace them, so it's probably not serious but still...
A stock installation of Ubuntu 20.04 only has very few snaps. I think the only important one is the Snap Store/Ubuntu Software. If you can put up with the Snap Store, you can avoid (if you really want that) installing further snap packages.
Those snaps are just, if I remember correctly, the dependencies for snap-store
So removing all of this only removes the snap store, which you don't need anymore ;)