A video related to the Yoga one you posted answers this (not whether Krav Maga is biblical specifically, but martial arts in general, even some forms that Krav Maga takes inspiration from). In case you haven't watched it, or in case this may be of use to someone else in the future, the video in question is: [
The Secret Dangers Behind Martial Arts !] There was another one, but its view on life after death was erroneous.
A day after you posted this, I was going to respond with some verses touching on self-defense (acceptable under certain conditions) vs. the spirit a person has as they're competing in Martial arts/sports (not acceptable), but since I didn't have first hand experience with Martial Arts / contact sports I refrained from replying. I didn't even touch on the occult, however, the video I linked to above (plus the sermon posted by "The_Creation_Center", [
The Christian View on Sports]) confirmed my suspicions about everything I was ruminating on.