While I am not a Youtuber, I do occasionally post videos on there and watch videos on there. If you do not know what a Youtuber is, here is the definition according to Oxford Dictionary online.
Youtuber: A frequent user of the video-sharing website YouTube, especially someone who produces and appears in videos on the site.
They even have "concerts" of Youtubers and they are quite popular with the youth of this day and age. So...here's a book trailer for my Between the Bleeding Willows (Book 1 of Demon Hunters series) created by Stolen Glances and uploaded to Youtube. https://www.youtube.com/watch?v=gBICLCIVERw
And here is one of my favorite Youtube videos (cursing in the video, so no little ones please):
And for those with little ones, Youtube has some videos, such as the one I listed that are not good for children to watch. BUT, they have created Kidstube, which is a safer alternative.