Youtube is a huge tool as a substitute teacher, whether you find a quick video for a time filler, a read aloud, a short film or even to just play some music (which I use as a reward). Here are some Channels I use frequently:
GoNoodle -
https://www.youtube.com/@GoNoodleSaiReadingTime -
https://www.youtube.com/@saireadingtime/videosand
Games4esl -
https://www.youtube.com/@Games4esl