If a ball is hit into foul territory but comes back into fair territory before getting to the bag, it’s fair. That’s just the rules, man.
Rarely, however, does a ball go as far into foul territory as this ball did in a Triple-A game between Las Vegas and El Paso and make it back into fair territory. Especially when it goes foul this quickly.
But big props for the heads up play of the first baseman of the El Paso Chihuahuas. Never give up, man. Never give up.