god damn it it's that thing. It's like I don't know
What is it, some commercial horribly overuses it during transitions
I think it's supposed to make it look like it's from the '70s or something, a neat glimmer from some angle with the sun, it's basically a sliver of Instagram in motion
You can probably emulate it by overlaying some kind of texture with something (addition, overlay, glow, etc.) and moving it quickly by, fading in and out. I'm pretty sure my Vegas Movie Studio only has "mask (multiply)" as an overlay option, which sucks.