ようつべ後で見る　50％以上で削除　→　止めとけないので使えない

	a = document.getElementsByClassName('style-scope ytd-playlist-video-list-renderer')
	for (let i = 5; i < a.length; i++) {
		console.log(i);
		if (a[i].getElementsByClassName('style-scope ytd-thumbnail-overlay-resume-playback-renderer').length) {
			b = a[i].getElementsByClassName('style-scope ytd-thumbnail-overlay-resume-playback-renderer')[0].style.width.slice(0, -1);
			if (b >= 50) {
				a[i].getElementsByClassName('style-scope yt-icon-button')[0].click()
				document.getElementsByClassName('style-scope ytd-menu-service-item-renderer')[8].click()
			}
		}
	}