I don't see any quotes/evidence referencing "Vril Energy".
I see the Vril Device, with Focusing Stone inserted, using the Casamir Mechanism to fill with "energy".
As far as I can tell most of this stuff about Vril liquid etc comes from sources outside of the games. Aka the Vril wikipedia page.
It's interesting speculation, but seems extremely unlikely now.
Especially with the Vril being essentially replaced with the Keepers.
And the Keepers being associated so heavily with the Aether.
The first line of the timeline even says:
IN THE BEGINNING There was only the Aether and the Keepers.
If someone can find anything to show that Vril are not just Keepers since the retcons then it's a fair argument to make.
But if the Vril is just another name for the Keepers now, then it's clear that "Vril Energy" is just another word for "Aethereal Energy"