"We're planning to replace D&D's quarterly book output with opening a new medieval fantasy themed Chuck E Cheese every quarter." - A big important WotC guy.
"I don't know why they're this big on pizza, but that's what the execs want." - a mid level WotC employee.
"Honestly, pretty much everyone in the company wanted to either be a chef or work on animatronics. Morale has skyrocketed since the internal announcement." - a OneD&D designer.
Is that enough sources to convince you that's happening, or is this all really just one source saying he has multiple sources? I'm not saying that D&D Shorts definitely has no sources, but he's some guy on Youtube, not a journalist trained in this kind of thing working for a publication that could fire him if he gets it wrong. You need to judge what he says by how much we can verify to be accurate, and so far, he's been wrong about multiple things.