Browser Support • Enable Youtube Annotations: can I (and how)?

Operating system: Windows 10
Browser version: 33.2.0
32-bit or 64-bit browser?: 64-bit
Problem URL: https://www.youtube.com/watch?v=GbXFoAlsUvY&t=0s
Browser theme (if not default):
Installed add-ons: Old VK design 61.18; Flashify 1.0; Greasemonkey for Pale Moon 3.31.4; Modify HTTP Response 1.3.8; Pale Moon Locale Switcher 3.1; Tab Mix Plus 0.5.8.4; ThemeTool 6.2.0; uBlock Origin 1.16.6b1; YouTubeNonStop 1.0.10; Adblock Latitude 5.0.9 (disabled)
Installed plugins: (about:plugins): Adobe Acrobat 22.3.20322.0; Adobe Flash 34.0.0.315

If possible, please include the output of help->troubleshooting information (as text):Long story short, according to the video's author's comment under the video, one of the annotations should activate on the time mark of 0:22, but doesn't since annotations are disabled on YouTube in general. I know there is an extension to enable them on Firefox, but is there such one for Pale Moon?
Also, not so critical but still: does anybody know a working way to disable autoplay for YouTube on Pale Moon? I tried one script, but it didn't work, so I deleted it and forgot its name.

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