All (or at least nearly 2000) of Mr. Rogers episodes are available on Archive.org. It's really great to be able to share these with our child, and us parents often appreciate the break and quietness more than our kid does!
When my son was young and had to go get his first hair cut I thought of trying to find a Mr. Rogers episode to see if he talks about it. I found a very old episode, so old it was in black and white, and I was surprised to find he sat through the whole thing. Hair cuts can be a big deal for young children, but after watching that episode we've never had an issue with hair cuts. It still works!