Annoying like no other thing :
Got an old PC struggling with some contents and this extension now actually forces the definition instead of respecting user's choice whenever a definition change is needed.
Basically unwatchable videos many times..
Old behavior was superior by far as it respected the changes made after the module had done its work.

worked good for a day then it sends me to a community post each time I try to go to the YouTube homepage and it just refreshes over and over and over until I either close the tab, search for a video from Google, or have a direct link.

Works perfectly, but on Firefox 52.5.3 the addon is always disabled by default and FF asks me to install it again, and again and again. It seems it is not so compatible as author would want it.

glitches out and takes me to a community post on a never ending loop

I love this addon but it now causes youtube to redirect to channel posts/pages and I cannot stop it. Will need to disable until this is fixed.

After using this addon for some years, all of a sudden youtube.com redirected to a post on a page from a channel I have visited in the past. The page was hanging on this post and refreshing all the time. Couldn't solve it by deleting cache, cookies temp etc. Opened youtube.com in MS Edge and no problem occured. Restarted FF in save mode, without addons enabled! No problem with youtube. So I disabled all addons and one by one enabled them again. Found out that 'Youtube High Definition' was the problem of the redirecting of youtube.com homepage. I removed the addon from FF.

при первом открытии страницы ютуб, данное дополнение, вызывает перенаправление на случайно выбранную страницу и постоянную ее перезагрузку. Приходится вручную перезагружать страницу. Для устранения данной ошибки надо в настройках дополнения снять галочку пункте "Auto expand video description box"

for the people who have youtube refresh billion time problem, uncheck the "Auto expand video description box" option at the buttom