You should get updated to Pale Moon version 33.1.0 if at all possible - there are a number of improvements since 32.5.2 which could help.Browser version:32.5.2
32-bit or 64-bit browser?:64
Problem URL:https://www.youtube.com/watch?v=8F0q27Cm4iQ
Browser theme (if not default):
Installed add-ons:ubo
Also, there is an improved version of uBlock Origin available - see the github link to it in the first post in this thread - viewtopic.php?f=46&t=31050#p250858
If you install this updated version of uBo, you'll want to go to the uBlock settings dashboard ... ... and go to the "Filters list" tab, and 1) "Purge all filters" and then 2) "Update now" This will get you using all the latest uBlock filters, which should hopefully work better with youtube.
@Moonchild - if this becomes an issue you may want to consider linking to @UCyborg's new uBlock version instead of justoff's old version, which is getting quite dated now and is likely to cause problems on youtube if anywhere due to Google always fighting against the ad blockers. I haven't seen anyone report any bugs with this new version after 1 1/2 months in service. It's been working great for me on multiple machines.