I think we have to distinguish between people who outright post Russian propaganda like Scott Ritter and people like Greenwald and Mearsheimer who say the Ukraine war is a US proxy war and was provoked.
The latter applied to many US (and historically British empire wars, from where the US learned).
Greenwald had a Rumble contract for daily videos during the Biden years, so I think it would be fair to say he was a Trump influencer.
He also has many enemies in Brazil (e.g.. Supreme Judge Moraes), so that video could have come from anywhere.
But yes, he could also have been threatened over the Snowden files earlier.