Yeah, the distorted ABC Family logo is enough of a tell that the YouTube clip is a 16:9 video squeezed into a 4:3 frame.

I’m pretty familiar with Return of Jafar; saw the movie dozens of times as a kid, and I can tell you straight up before making any A/B comparisons that the ABC Family clip is the same matted transfer that’s on the Blu-ray. A few examples off the top of my head: in the unmatted version, you can see the ground opening up after Jafar claps his hands, but it’s not visible in the YouTube clip. Also, in the unmatted version, there used to be plenty of room above and beneath Jafar in the shot where he explodes. In the YouTube clip, he looks cramped and awkwardly placed in that shot.

Unfortunately, I don’t think Disney had ever broadcasted an HD transfer of the original 4:3 version.