A possible concise summary is:
Rebecca Zamolo and the Merrell twins do a twin telepathy slip and slide challenge with mystery boxes. They have to guess which slide the other person chose and avoid sliding through gross or sticky items. They also have a bonus round with Doritos. Rebecca Zamolo switches places with her twin RZ twin to prank the Merrell twins. They have fun and promote their videos and merch.
Some possible facts extracted from the text are:
1. The text is a transcript of a YouTube video featuring Rebecca Zamolo and the Merrell twins.
2. The video is about a twin telepathy slip and slide challenge with mystery boxes.
3. The challenge involves guessing which slip and slide the other person chose, and sliding through different items such as ketchup, honey, whipped cream and Doritos.
4. The Merrell twins have twin telepathy and guessed each other's choices correctly in the first three rounds.
5. Rebecca Zamolo switched places with her twin RZ twin in the bonus round and tried to trick the Merrell twins.
6. The Merrell twins noticed that something was off with Rebecca Zamolo's voice and clothes, but they still guessed her choice correctly in the bonus round.
7. Rebecca Zamolo asked the viewers to check out another video on the Merrell twins' channel, where they did a giant board game challenge.
8. Rebecca Zamolo also asked the viewers to give the video a thumbs up, check out her merch, and take the gamemaster network quiz.