A possible concise summary is:
Four friends, Mark, Matthias, J-Fred and Bryan, play the Don't Laugh Challenge, where they have to hold seltzer water in their mouths without laughing or spitting. They try to make each other laugh by touching, tickling, making jokes and noises. They also make fun of each other's mouths, noses and speech. Mark wins the challenge by holding the water for the longest time.
Here are the facts extracted from the text:
1. Markiplier is hosting a "Don't Laugh Challenge" video.
2. Markiplier has done the challenge twice before.
3. Markiplier's guests are Bryan, Matthias, and J-Fred.
4. The challenge involves drinking seltzer water to make it harder not to laugh.
5. Touching is allowed in this version of the challenge.
6. There are no rules or limits in the challenge.
7. The guests try to make Markiplier laugh while he is drinking seltzer water.
8. The challenge is timed, and the guest who makes Markiplier laugh the fastest wins.
9. Markiplier has a small mouth.
10. Bryan, Matthias, and J-Fred make fun of Markiplier's small mouth during the challenge.
11. The challenge involves a lot of joking and teasing among the guests.
12. Markiplier's guests try to distract him and make him laugh by making silly noises and faces.
13. The challenge is a fun and lighthearted game among friends.
14. Markiplier's guests are from a group called "Team Edge."
15. The challenge involves a lot of laughter and joking around.
16. Markiplier and his guests reference a story about a girl with "mall mouth" that J-Fred went on a date with.
17. Markiplier and his guests make fun of each other's noses and mouths during the challenge.
18. Markiplier's guests try to get him to laugh by contorting their lips and making funny faces.
19. The challenge involves a lot of silly and absurd humor.
20. Markiplier's guests reference a phrase "for all the marbles" and Markiplier insists that the correct phrase is "for all the beans."
21. Markiplier's guests are confused by the phrase "for all the beans" and think Markiplier is joking.
22. The challenge is a fun and entertaining way for Markiplier and his guests to spend time together.