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fix: prevent large playlist handler from interfering with YouTube queue autoplay (Fixes #4228) #4263

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fix: prevent large playlist handler from interfering with YouTube queue autoplay (Fixes #4228) #4263

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6 changes: 4 additions & 2 deletions js&css/web-accessible/functions.js
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Original file line number Diff line number Diff line change
Expand Up @@ -382,10 +382,12 @@ ImprovedTube.videoPageUpdate = function () {
ImprovedTube.playerControls();

// Initialize large playlist handler for playlist videos
if (this.getParam(location.href, 'list')) {
// Skip queue-type playlists (WL, RD, etc.) to prevent interference
var listId = this.getParam(location.href, 'list');
if (listId && listId !== 'WL' && listId !== 'RD' && listId.indexOf('RDAMVM') !== 0 && listId.indexOf('OLAK5uy_') !== 0) {
ImprovedTube.playlistLargePlaylistHandler();
} else {
// Cleanup when not on a playlist
// Cleanup when not on a playlist or on a queue-type playlist
if (typeof ImprovedTube.cleanupPlaylistHandlers === 'function') {
ImprovedTube.cleanupPlaylistHandlers();
}
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10 changes: 10 additions & 0 deletions js&css/web-accessible/www.youtube.com/playlist.js
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Original file line number Diff line number Diff line change
Expand Up @@ -22,9 +22,19 @@ ImprovedTube.playlistUpNextAutoplay = function () {
// currentIndex and localCurrentIndex to desync at chunk boundaries.
// This handler keeps them in sync so autoplay continues working.
// Only runs when playlist_up_next_autoplay is NOT disabled.
// ⚠️ Skip queue-type playlists (WL=Watch Later, RD=Radio, OLAK5uy_=auto-mix)
// to prevent interference with YouTube's queue autoplay behavior.
ImprovedTube.playlistLargePlaylistHandler = function() {
if (!this.getParam(location.href, 'list')) return;

// Skip queue-type playlists — these are not regular user playlists
// and the index sync logic can interfere with YouTube's queue autoplay
var listId = this.getParam(location.href, 'list');
if (listId === 'WL' || listId === 'RD' || listId.indexOf('RDAMVM') === 0 || listId.indexOf('OLAK5uy_') === 0) {
this.cleanupPlaylistHandlers();
return;
}

// Do not sync indices if the user has disabled playlist autoplay,
// because playlistUpNextAutoplay intentionally sets currentIndex
// to totalVideos to prevent the next video from playing.
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