Speaking of long, this is a slow burn.
There's a fairy tale rule of three thing going on where in the first arc Utena fights a duelist, then fights their other half in the black rose arc, then fights the pair in the endgame arc.
And the setup is nice.
Oh, and the YouTube upload is legitimate and from the real licensor.
https://www.youtube.com/playlist?list=PLrrh84y760v-hDEulas0Tp_wiQy0FcjLl
They leave all kinds of details in the first arc that pay off in Black Rose that you weren't even expecting.
But black rose is so full of other people's stories that dueling with Utena is kind of a formality. Utena herself might be a formality in that arc.