That timing is interesting, I wouldn't be surprised if SCM is a hacker news reader or at least has a Google alert set up and actually saw this thread and reacted.
Using the filename and basic dorking you can still find copies as I found a half dozen last night when sharing the above link, but seems like sharing any link just helps it disappear. If the two channels are really the same producer, which seems true to me, than some of the actions recorded for Vagrant Holiday are not something you can put your face next to, if SCM was filming in his own neighborhood he may have become concerned about opsec and what clues are inadvertently remaining in that old content that could lead back to him. I don't see what external privacy/legal concern would cause all videos to be removed since they are all different subjects so I think it his choice.
Yeah, I thought this too. My impression is he doesn't want to be associated with this video anymore. If I had to speculate I'd say VH seems like a person with a clear moral code who has outgrown the idea of having filmed people against their will. The video has also recently been used to make Oblivion NPC memes with a million views. I think he's tired of it, but that's mostly just speculation.