This style forces to use the pre-flexy video size before it first came out in 2018.
/* ==UserStyle==
@name YouTube - Force consistent video size (revert to pre-flexy)
@namespace https://greasyfork.org/en/users/933798
@version 20250418.11.22
@description This style forces to use the pre-flexy video size before it first came out in 2018.
@author Magma_Craft
@license MIT
==/UserStyle== */
@-moz-document domain("youtube.com") {
div#primary.style-scope.ytd-watch-flexy, ytd-watch-flexy[flexy] #player-container-outer.ytd-watch-flexy {
min-width: 853px !important;
max-width: 853px !important;
}
/* Replace background from transparent to black translucent one */
ytd-watch-flexy[flexy] #player-container-outer.ytd-watch-flexy {
background-color: #000000 !important;
}
/* Remove rounded edges on videos due to buggyness */
ytd-watch-flexy[rounded-player-large]:not([fullscreen]):not([theater]) #ytd-player.ytd-watch-flexy, ytd-watch-flexy[rounded-player] #ytd-player.ytd-watch-flexy {
border-radius: 0px !important;
}
}