There's a treasure trove of programming on YouTube. Many shows I remember fondly have ended up there. On subbing-free Wednesdays, I'll present a random video that I loved back in the day. Some of these may not have aged all that well. If you have some time, come on and take a trip down memory lane with me.
The Day the Universe Changed. When I saw various episodes on PBS as a teen, I remembered how much I had enjoyed science back when I was a kid. It's one of the reasons I majored in physics in college.
It's a show about the history of science. It takes some "modern" concept (the show came out in 1985, so now their modern is 30 years out of date) and traces how it came to our understanding. Many times, it's almost a miracle that we know anything at all.
What I loved about this show was how funny it was. At least, I found it funny in how various ironies played out. James Burke had a way of describing things (in that very British way) to highlight how very human the scientific process can be.
Once upon a time I wanted to get all of these episodes on video, then DVD. Now, some are on YouTube.
(Turns out that I can buy this now. Isn't the internet grand?)
This episode is titled "Infinitely Reasonable", and it's one of the reasons that my blog title resonated with me. (I can't say it's why I started calling my blog Laws of Gravity, but it was definitely a contributing factor.) It's 45 minutes, but it passes fast if you enjoy this sort of thing.

