Lovely furry characters! Their designs have so much vibe. However, I don't think making a vertical portrait aspect ratio video letterboxed in a horizontal landscape canvas was needed. All it does is it adds unnecessary space.
EDIT:
I see. Well, it's not a problem for me personally cuz I only watch videos on my desktop PC. But, Newgrounds does allow vertical videos too and I think rendering this compilation in the segments' native aspect ratio would simply be more convenient for those who browse this website on their phones.