If you are a chaperone (18 years or older) of a child and want to accompany them in the Meet & Greet Hall for their meet & greets, you will be permitted to enter as long as you have purchased a VidCon ticket. If your child received sessions via matchmaking, you will not be able to actually participate in the session unless you received the same one, but you may wait in the Meet & Greet Hall with them.