FYI: Anytime there is a web link that contains either a "?" or "&" in it (but especially a "?"), anything that comes after the "?" is extraneous code that is not needed to view the link. What this extraneous code is or does, I don't know for certain, but I'm guessing it's used for some type of tracking. So, when you see a link that has extraneous code, you can delete that portion which is extraneous, including the "?" symbol, and that link will still work.
For example, the "clean" above link is:
https://youtu.be/reeafpclc28