There are a few good YouTube channels out there. Veritasium, PBS Space Time... and Smarter Everyday.
Today's episode was on the JWST. This guy's father was involved and he got to interview Dr. John Mather on the design of the telescope. I thought you all would be interested
There will be more content coming soon from the same channel on the telescope, so stay tuned!
https://www.youtube.com/watch?v=4P8fKd0IVOs