Greasy Fork is available in English.
Video description, long comments and list of subscriptions are expanded automatically; all the replies are shown after pressing "Show more replies" button
< Spätná väzba na Youtube: expand description and long comments; show all the replies
It still works for me in FF, Chrome and Opera. The only explanation is that YT introduced a new design for your account or country or language. Sometimes it happened and the only way is to wait until this new design reaches me and I can amend the script.
Doesn't work anymore
I tried with a new chrome tab with no other extensions