Earlier quoted context omitted.
You do realize YouTube is one of their main threats, and their main advantage over YouTube is higher quality? Giving treasure trove of quality content to YouTube in exchange for peanuts while shuttering their own, that would be a double whammy.
As opposed to making zero money, having your content be pirated and not having an official archive? Putting it on YouTube with ads would have without a doubt been the better option here
In all seriousness, giving existing and potential customers more reasons to spend their time on YouTube is not good for their business.