Add anywhere from 1 to 5 YouTube links, write a note, and you get one link to send. Whoever opens it presses play and the whole thing runs on its own.
Names fill in on their own once you paste a link. Change any of them if you'd rather.
One thing to know: whoever you send this to will get YouTube's normal ads before some of the videos, unless they pay for Premium. Nobody can switch those off. They don't stop the run — the next one still starts by itself.
Keep this tab open and it plays all the way through. Any ads are YouTube's own.