Oh wow, I did not think this was a glitch. But coming back to this video (the question 3 one that I mentioned above), all of a sudden the buttons are there. So maybe it is a glitch. It happens so often I just thought that some of the videos were embedded in the site differently.

to combat this issue, i go back to a different lesson, then press next to reload it. There are probably other methods that work. Usually reloading it in some capacity works for me

No, this completely makes sense. You are givings words to something I do but have not articulated. You also added a few things that I had not thought about it. Thanks for posting! I'll think about these tips!