YouTube has rolled out significant updates to its apps, introducing improved playback speed controls allowing adjustments in 0.05x increments. Users can now create collaborative playlists by sharing links or QR codes and even customize thumbnails with AI-generated images. The mobile app's landscape mode features larger thumbnails and responsive controls, while the mini-player has been enhanced for better browsing. Upcoming features will include a voting system for collaborators and a sleep timer for all users. The TV app also sees upgrades for a more immersive viewing experience.