Broken Base: Many of his more recent videos have focused more on anthropology and human society than biology and paleontology. Some find these videos to be an interesting change of pace from his earlier work, while others get frustrated when he uses them as an excuse to preach about his own political beliefs.
It was owls. explanation: In his Cryptid Profiles on the Mothman and Flatwoods Monster, a misidentified barn owl was the explanation for both cryptids. This quickly became an in-joke among his fans.
It was a basking shark.explanation: Another Cryptid Profile was about various sea monster carcasses turning out to be decomposed basking sharks. This also became a popular in-joke.
Baskingowl!explanation: The logical combination of the above two.
They aren’t aliens, they’re penises. explanation: Some fertility amulets in the Flatwoods Monster episode.
Nightmare Fuel: His conclusion of the possible identity for the Loch Ness Monster: A giant freaking leech. He even lampshades this!
Squick: Watch his speculative idea for what the Loch Ness Monster is. If that doesn't scare you out of ever going near the lake in your life, nothing will.