This may answer many of your questions. Watch to the end.
What are your thoughts?
In watching the opening of the video it looks like the same tired old line taken from "The Two Babylons" only it is talking about Lucifer and Luciferianism.
The Two Babylons - Wikipedia
And the sad thing about the former book it was largely reading into ancient liturgy etc. rather than its opinions actually studying the Christian history of liturgical worship and sacramentalism. Lots of ancient things, including Christianity to a modern Protestant look pagan etc. if they actually come from ancient times. The problem is nonsacramental Protestants largely forget what the original Judeo-Christian tradition is all about since they have regulated all the temple type worship to the past and basically ignore the fact that imagery is depicted taking place in heaven etc.
Besides this there is actual Christian appropriation of pagan symbols, tropes etc. if such things come from their ethnic heritage. This I also do not see as damning, but rather I see it as a sign of Triumph (Christ and his followers conquered the pagan Faith and now these things are used positively as far proclaiming Christian doctrine to these people and this is part of the unique heritage of that people going forward).
Besides this fact the Bible itself in the case of ancient Israel did this numerous times, starting with the earliest chapters of Genesis. Saint Paul also deliberately referenced pagan writers in his writings to illustrate spiritual truths etc. But in conclusion I don't believe this taints Latin Catholicism, or any of the other ancient Christian Churches (from Greece, Turkey, Egypt, Syria, Armenia, India etc.) ; because, if it did then well ancient Judaism would have been tainted a few thousand years before Christianity ever came into existence.