Besides the vlogbrothers, there is only one collaboration I'm keeping up with on YouTube, and that is acrossonesky. It is comprised of Candy from Ireland and Christina from the US. I wish I had done a transatlantic collab channel like this when I was in high school. On Christina's personal channel, to which I'm also subscribed, she made a video constructing adorable homemade holiday cards. I was lucky enough to be one of the commenters she selected to receive one in the post!
Immortalized in my Indiana bedroom. Thank you so much, Christina!