There are lots of videos with views of popular tourist sites on YouTube. But if you want to learn anything, you need a guide. So look for videos with narration. You can spend happy hours searching out the best. A good example is this one, of Machu Picchu; https://www.youtube.com/watch?v=d09AwPp5nag. An interesting short explanation of the engineering of the Great Wall of China is at https://www.youtube.com/watch?v=BefKbn6LisI.
"Go" to a museum (again)
We've posted links to museum virtual tours before, but this seems like a good time to revisit (haha). This is quite a compehensive set of links:
https://www.expedia-aarp.com/blog/virtual-tours/?MDP.US.TPS.AARP.SOCIAL-VIRTUALTOURS.GENERIC