You can visit dozens of Christmas Markets this year via the Frankfurt on Foot videos. Here's a fun one on FB.
I agree that the Frankfurt on Foot videos are the next best thing to being there. Their YouTube channel has many other videos that are equally interesting. I subscribe to the channel so I don’t miss anything. I highly recommend them.
I also follow on FB and Instagram. Lots of good content!
I have seen several of their Christmas Market videos which really show it how it is. Lots of fun seeing the differences.
I will admit that I am several behind because there are SO many....
I have been having so much fun watching the Frankfurt on Foot Christmas market videos on YouTube! And while there's nothing like being there, I've been to more lovely markets than I could possibly have allocated time for in my 2020 trip that didn't happen. I'll get there, though!
there's a good one on Youtube showing the crush at the Paris Christmas market.
I was just experiencing the one in Strasbourg in person and believe me, it's much safer and simpler to watch on TV!
Here is another good one: https://www.youtube.com/watch?v=BvylwDspV9o