Good video! You lucked up on those heritage units. I can't believe that the SRR black/gold/white paint is now a thing of the past, used to see them all the time in my youth.
I love the 630, it's the first loco I ever got a cab ride on, in 1981. It's also former ET&WNC 207 and my parents saw it in that road name plenty of times when they lived in Elizabethton, TN in the 60s. I badly hope to get back to TVRM when she's running someday, saw her right after the restoration was done, in 2012.