The Telegraph has a 90 second description of Daylight Saving Time. The video doesnt have any narration so it can be watched without noise.

Like I do practically every time Daylight Saving Time begins or ends, I have actually congregated a handful of short video explanations about why we have Daylight Saving Time. Take a look and see if there is one that can assist you describe Daylight Saving Time to your students..
National Geographic has actually 2 videos titled Daylight Saving Time 101. The first one, released in 2015, is a bit more upbeat than the second one that was published in 2019. Both versions are embedded below..

TED-Ed has two lessons that arent particularly about Daylight Saving Time but are related to the topic. The History of Keeping Time explains sundials, hourglasses, and the advancement of timezones.

If it isnt as concise as the videos above, CGP Greys video description of Daylight Saving Time is still a great one even.

Daylight Saving Time ends today for a lot of my pals in Europe and it ends next Sunday for those of us in North American states and provinces that observe Daylight Saving Time. As somebody who gets up early and lives in a northern state, I invite the change as Ill see the sun an hour previously. And ideally, my kids will benefit from the “additional” hour of time for sleeping next Saturday night.