That's sedevacantist.
From the front page of their website:" unless you have been attending the Latin Mass exclusively, you should refrain from receiving Holy Communion until you have had an opportunity to meet with Father."
How is the "meet with Father" provision of any significance when it is a livestreamed Mass where receiving communion isn't even a consideration?
I am not SV, though I admit I could be wrong, the see is either vacant or it is not, and there are also the
materialiter-formaliter, sedeprivationist, and so on, schools of thought. We will know for sure when Our Lord chooses to make things more clear.
In these circuмstances, and given that we are not "really attending Mass" when we view it online, I am not going to be all that picky about
una cum or
non una cuм. I was just asking.