If you enjoy Feynman's lectures as much as I do (he taught freshman physics when I went to Caltech!) I highly recommend his armchair series, "Fun to Imagine":
It's amazing to see something like this on film. Someone had to think long about doing this to ensure they had the equipment necessary, the money available to process/develop the film, edit the film, etc. Now, someone just whips out their phone and shoots someone without even thinking about it.
This is one of my favorite things on Youtube. With off-the-cuff words alone he paints more vivid visuals than most high production value videos. I particularly like the "Magnets" bit, even though it's more controversial.
There's the time a student was misled by an error in the Feynman Lectures and wrote to him about it. Here's the story and the recent HN thread about it.
https://www.youtube.com/watch?v=nYg6jzotiAc
He's sitting at home in Pasadena, talking about stuff that comes to mind.
• Jiggling atoms who like to make friends with each other.
• Where do trees come from? (It's not the dirt.)
• Why don't your arms sink through the armrests of your chair?
• How do trains stay on the tracks?
It's an hour of fun science, and especially accessible for anyone who is curious about physics but doesn't enjoy all the equations.