what is this grab?

[Rlagkrud]

M2k does this grab when he chaingrabs on FD.
https://youtu.be/8Tv8tYtDu0w?t=1m15s

Starting at 21%, this doesn't look like a pivot grab, but it's not a regular grab either.
What is it?

 

[ridemyboat]

Slow it down to 1/4 speed, it's a regular grab. Marths grab goes all the way to his back.

 

[AirFair]

yep. Hitboxes are fun.

 

[Silfo]

So can this be used instead of pivot grab at certain percents for no DI?