Hello!!!
Well, recently I've been watching these React Videos, by the Fine Brothers on Youtube. They are so funny and entertaining! The videos are divided into 3 divisions: Elders React, Teens React, and Kids React. I think that there are 92 React Videos total as of today, but they always release more on Sundays and Thursdays.
Kids React were the first ones I think. The Fine Brothers show a group of kids videos that they found, including things like Nyan Cat, Epic Meal Time, and Charlie the Unicorn. The kids then react to and are interviewed about what they thought of them. The same basic principles are applied to Teens and Elders React, only with...well, teens and elders.
These videos range from music videos, to famous Youtubers, to musicians, to viral videos, movie trailers, and more!!! And occasionally, people like Fred (Lucas Cruikshank), CIMORELLI, and Jake Short are featured on the videos and will participate in answering the questions.
You should definitely check it out! Here is a link to The Fine Brothers' Home page: http://www.youtube.com/user/thefinebros?feature=results_main

The Fine Brothers don't only make React Videos. They also have a sitcom called MyMusic and many more series, like Lost (I think that a lot of them are already finished). For Extras, go to their 2nd Channel, here: http://www.youtube.com/user/TheFineBros2

Be sure to check it out and watch a couple videos! It's very entertaining, and the videos they choose are awesome!
Bye, and until next time!