Your link goes to a preprint at “ResearchGate” from May 2020. Preprints are not peer reviewed.
ResearchGate itself is some kind of commercial outfit founded in 2008 rather than an established research publisher like PubMed or Nature. There’s plenty of pay to play websites that are known as “predatory publishers” and which no one in the actual world of research use.
https://instr.iastate.libguides.com/predatory
The author of the preprint isn’t Luc Montagnier, it’s one “jean-claude Perez” who lists his own specialty as “Languages and Linguistics” with no CV indicating any medical experience at all. But he’s not shy about churning out impressive sounding papers for sites like the “International Journal of Research” which is in the same league as ResearchGate.
https://independent.academia.edu/Perezjeanclaude
More to the point, Steve Van Doorn claimed that the study he linked to mentions Plasmodium yoelii, the malaria parasite. It doesn’t. It never mentions Plasmodium yoelii at all.
It’s nothing more than Steve pretending that he has the expertise to read a genetic sequence and know that it has to be Plasmodium yoelii based on... what? His imaginary education in genetics? I’ve found that the biggest danger to the conspiracy crowd is taking the time to read the sources that they cite.