Do Not Do This Cool Thing: The safety message at the start of You On Kazoo! tells its viewers not to run, jump or dance while playing the kazoo, however Brett and the other kids in the video do all of these things, outside that is, whereas the viewers at home are inside. Technically speaking, the message and the way it is distributed could be an honest-to-goodness sign of preventing indoor-outdoor safety hazard.
"Wait a minute... Who ARE you?"Explanation Brett's initial reaction to the viewer; often used as a reaction video to dismiss strangers on the Internet.
The Pretend Spirit. He sounds like a stereotypical pedophile and watches a group of children while being nowhere to be seen.
Brett himself becomes this in "Ring-Along, Sing-Along", when he creepily crawls towards the camera.
Memetic Psychopath: Brett in "Ring-Along, Sing-Along". The Little Girl asked who he was and suddendly disappeared in the next shot. Some joked that Brett deleted her.
Tear Jerker: The ending credits, especially the piano music, the forest stock footage scene and some of the kids (most notably the girls, who had their voices re-dubbed) laughing, giggling, and saying "goodbye," "see you later," and "so long," from the beginning to the very end. For those of you who feel the need to cope with those feelings.