Do know the church itself is massive/large, it may just be delay from where recording back to audio equipment.

I would assume that Brent and Mr. Cavalli probably sync'd all video/audio by having a common sound such as a hand clap, so there probably is a delay. This is not uncommon, but happens in English and American Churches - especially those that have a large volume of space to fill and when the console is not with the pipes and there is some type of electric action from the console to the organ pipes (and St. John Cantius - Chicago has a remote Echo Division that is all the way across the room). I have played at several churches in the USA where there is a significant delay between the notes pressed on the keyboard to the pipes sounding. You just have to sally-forth and ignore the pipes just keep the tempo going, do not listen to the pipes because you will become slower and slower. Also you have to figure in a large congregation singing and you certainly cannot listen to them or you will lag behind. The Echo Division is there to help support the entire congregation and keep the tempo going.

@@jefferyrowley8873 I can vouch for this. I was lucky enough to have two large organs available to me here in the UK when I was a student, too many years ago. One had the console just to the west of the organ chamber; the Great was therefore about 20ft above me and to my right when playing, so there was negligible delay. The Swell and Solo however were way up in the triforium about 150ft diagonally up and right of my ears and the delay there was over 1/10" which doesn't sound much until you try to play fast! The other organ was split on either side of the chancel, the console being on the south side fairly close to the Swell, Choir and (some) Pedal but the Great was high up in the north case well over 100ft away. That coupled with a very sluggish 1930's electropneumatic action - worse on British cold damp evenings - and a confusingly long reverb time made playing very, very challenging indeed.

It’s movable

Yes, Wurlitzer Opus 1818 from 1927

I hope Brent does a video on this theater organ as well...I thought there was one in the church hall