The ideal you mention doesn't work in with Youtube's current policy.
YT is simply not lucrative anymore when it comes to animation because it just takes too long. Even if a lot of animators came in to chip in with different videos it'd still be 20% of what another channel who can spam Facts, Top 10s or Let's Play videos a day can generate.
Bravest Warriors is basically the only survivor because it was the most successful, and even then it hardly brings in the dough the 107 fact videos give.
Sadly this is the world we live in now.