Thanks for your message. I am not aware of any issues with the videos. From my side (I run the servers here) the videos appear to be streaming normally. It's possible your connection is having problems, or your connection is having trouble communicating with the server. My first suggestion would be to reboot the computer and see if it makes a difference. If that doesn't help, it might just be something transient between your computer and the server and I'd suggest trying again.
I'm glad the videos don't wear out!
We'd be replacing them like crazy if they did. Last year the videos were viewed close to 20 million times. Folks like their free knitting videos!