Leaking episodes would definitely be a no-no. However, it is not copyright infringement to post on YouTube. Copyrights are to ensure that you do not make money off other people's work. Since YouTube does not generate income for the poster, it does not violate the copyright laws.
Actually, it does. Monetary gain is not a necessary condition for a copyright violation. It only make the punishment harsher.
Since I make my living off of copyrighted material, let's make this clear:
It is never permissible to post someone else's work without their permission, except as a small portion of a larger work that is a commentary on that included material (and perhaps others).
The law actually goes beyond that: With only three exceptions, you are
never allowed to copy someone else's work without their permission, not even to make a personal copy. The exceptions are for computer software (individuals, including you, are allowed to make one, and only one, backup copy, of computer application software, only, but cannot give it to anyone else), libraries (recognized libraries, only, are allowed to make archival copies for safekeeping), and capturing broadcasted content for later playback (an exception which allows VCRs and DVRs to exist).
This whole "you can copy stuff as long as you don't charge for it" is wrong, false, erroneous... and illegal.
Think about what you do for a living. Whatever it is, it basically relies on people or companies paying for what they take from the company you work for. The whole system falls apart if people could take what they wanted and simply decide not to pay you for it, or if they could determine, unilaterally, what it is they're buying when they buy for you. Either way, this kind of nefarious action deprives the company of the money that is intended to pay you, and keep the investors from taking their capital elsewhere and closing the company down.
With some things, it is easy to secure the sale. With other things, especially in this digital age, it is getting harder and harder. The rampant theft going on, via copyright violation, makes the prices for everything higher for law-abiding consumers.
To the OP: You should actually contact YouTube directly. They'll address the issue. Contacting Disney would just add more time to the transgression.
