皆様お久しぶりです。 動画投稿を楽しみにしていた方は申し訳ございませんでした。 今年から中2なので動画投稿をするのを少なくなるかもしれませんがよろしくお願いします。
To listen while using other apps, switch the player to Picture-in-Picture (PiP) during playback — it keeps playing in a small floating window (the screen stays on).
To listen with the screen fully off, in-browser playback stops by YouTube's design. Open the video in the YouTube app to keep listening where background playback is supported (e.g. with YouTube Premium).
Open in YouTube app