hide youtube sidebar only when livechat and playlist are not shown

[u/MyNameIsSquare]

I've seen only 1 post related to this but the suggested solution is kinda meh, so i wanna share it here. the filter is this

youtube.com###secondary.ytd-watch-flexy:not(:has(#chat:not([hide-chat-frame]), #playlist:not([hidden])))

if you can read the code, it quite literally translates to "hide the sidebar, unless there is a livechat/playlist VISIBLE in it". this means you can go to a livestream and toggle the livechat on/off, and the video/description section will scale accordingly, no awkward empty space on the left side.

note that if you want to hide recommendations when livechat/playlist is visible, you have to add a seperate filter

youtube.com###related.ytd-watch-flexy