I came across this neat website: thekidshouldseethis.com
Started by a mom, it's a curated site with lots of very cool videos that are (mostly) not created for kids in particular. They are just neat, educational, STEM, artistic, or otherwise interesting. I've just begun to explore the site, but the videos I've seen are fairly short. There's also a list of toys/books/gifts that she and her family like, if you are interested in that sort of thing. I mainly like the videos.
Not sure if this was shared here previously or not, but I really liked it.
Enjoy!