I searched for a solid month for ANY sort of fix that gave me an integrated queue and watch later on the video page and not the home page that had been taken from me at the beginning of the month with no luck. I had the same thing happen the previous month and was lucky enough to find a ublock script that restored it, but that fix was apparently patched by youtube, and no matter what I tried, there were no fixes. THIS fixes it.

It's worth noting that this add-on doesn't use the same buttons youtube uses, but at this point that's better, because it takes the power out of youtube's hands so they can't take it away again. I tried it out on my existing queue that I had open on a page and it added it seamlessly. I highly recommend this add-on, no caveats.