I can't find the original source of this video, do you think it's a fake ?

The thing that says bogus to me is the close up of it streaking away. It's called streaking away for a reason. It usually is so fast it makes a streaking effect even to the human eye. This does not it's so perfectly in focus. It would have to be an ultra high speed camera yet it just appears to be infrared. But I am definately not an expert on cameras or ufo technology. I'm just giving my opinion.

After watching a few times, it looks legit to me.

I thought there was software to determine if an image was edited?

My gut says it's not real.

Fake

I Would Exspect more of smaller Blocks of different greytones on the bottom left at 00:43 for example

The areas around the IR image look like Blocks of same brightness. It is a not so perfect microsoft paint app job