Historically it doesn’t matter what the creator of anything prefers unless it’s an “unveiling” and they name it on the spot.
I can't for the life of me find it now, but the gif was introduced with an image that contained in its metadata a statement that "it's pronounced jif". You can still find it somewhere and open it in notepad and read it for yourself.
Yeah, I have friends who say it with a hard g and I never say a damn thing, but I say jif once and it's "jraphics" this and "jod" that. I get it, you watched that stupid video in 2012, congrats.