(Please note I don't support YouTube taking copyrighted material off the site. I found it interesting the poster would have the guts to post such an undertaking when he/she should know about that, presuming their whole channel probably consists of cartoons.)
I've always had a certain set of rules that I'd like people to follow when uploading copyrighted material (exceptions are anything public domain, which Disney has assured NONE of their post-1937 are):
1. If it's a movie or TV show episode, but in decent (or high) quality/non-16mm, then it should have ads.
2. If it's a cartoon (10 minutes or less), then it may be free of ads, though it is recommended
that the uploader ask permission from the copyright holder first or put a disclaimer on the video description. (Usually they'll say no, which is why I underlined "recommended".)
3. If it's anything 16mm (mainly short films or foreign dubs) or even bad picture quality, or the opening/closing to a TV show, then you should be free to upload.
Not trying to be the copyright police here (very ironic considering my status, actually
), but still.