My friends are now into running archipelago randomizer worlds so I've been playing Pokemon Emerald and Fire Red together with my friends who are playing Tunic and Satisfactory.
Super pleased with how smoothly archipelago works and how much effort modders have put in to keep it that way.
I am considering buying factorio to play as well. It's so much fun to add a multiplayer aspect to single player games while also essentially adding infinite replayability because every game is different.
I don't think I said that OP was wrong (in fact I'm pretty sure I agreed with OP that it was annoying as a fully abled user until I figured out what was going on), but to elaborate on my earlier point just slightly - once a horizontal slider element is in focus it will always use left and right arrow keys to move if they're pressed. Up and down always works to change the volume because there are no other elements when the video player is selected that are waiting for an input.
If they made the volume slider vertical instead of horizontal it would end up working actually better in this case (because the vertical slider would instead wait for up and down arrows), although that probably wouldn't look as "nice", but I'm not a UX dev so it could probably be jazzed up to look nice.
This is an accessibility function and happens because the volume slider has focus. If they made it so that left and right arrow keys always moved the video forward/backward it would break that accessibility and shut some users off from being able to use the website.
As annoying as it might be to someone who has full use of their mouse and keyboard it is imperative that websites can have all of their functionality accessed through something as simple as tab and arrow keys because that's all that some people are able to use.
Note that I'm in your boat and find it to be annoying and just something to remember to unfocus after changing my volume, but having just recently been going through some accessibility training I can understand why this happens.
It's just the Dewey Decimal System, so you could look up whatever topic you like to find what it would be classified under. There's thousands of topics that are covered here - there's a reason it's used for every non-fiction clarification in a library - that would be far too numerous to list on a single shelf listing. This library has chosen to prioritize the awkward questions as a way to help someone who otherwise may not know how to get help.
Alternatively, most libraries have a catalogue you can search by keyword and it will give you book results which will let you know where they are on the shelves. But again, that requires you to know that the catalogue exists and how to use it. It's always going to be easier to ask a librarian, who can make sure you find something to help.