The Plano-mill might be salvaged, if anyone wanted one, as the main slides are (largely) protected by the table.
Machines always look more rusty in photos/video than in RL, too. My current lathe looked rusted beyond use in the photos, but polished up fine with a bit of wire wool. Though I would not go so far as to assume that the same is true of the lathes in the video.
FWIW the creator of the video knows more than a bit about lathe reconditioning, he is nearly finished with a complete restoration / re-scrape of a Holbrook.