He didn't give a name for it. He just explained his view, in depth, in the video. You should watch it - 2 hrs long, but you can split it up. Very informative, lots of history and he's a good public speaker, so enjoyable.
I will try to watch the first part of the video. I've only seen part 2.
Still, if Father has not said that he is a sedeprivationist, then I think it's premature to designate him as such. You may very well be correct, in that he is a sedeprivationist. But since he has not specifically said so, then there may be a prudent reason for not doing so. Maybe he doesn't want to become the leader of the sedeprivationists. There wouldn't be a moment's peace for him, if he took on that role. Yikes!
You mentioned not long ago that Fr. Chazal's video was the reason for this thread, but actually, that's not true. Fr. Chazal's video was posted by Ladislaus after the thread was created. I started this thread because I think that sedeism (in any form) is over-represented here on the forum, and that it's a threat to the unity of tradition.
Some here of course will not agree, but I, for one, am not a supporter of sedeprivationism, even if Fr. Chazal turns out to be one and has made a good case for it.
Fr. Chazal is quite critical of sedevacantism in general in part 2 of the video. I don't recall that he had said that the problem of sedevacantism exists only with the dogmatic sedes.