If you noticed, the Bf 110 was also targeting the engines that powered the back up hydraulic and electrical systems after taking care of the tail gunner. In any event, I seriously doubt that Fortress made it home. Hopefully those that were able to bail out (if any did) were able to parachute to safety and at least sit out the rest of the war in a POW camp.
That footage shows goes to show brutal the air war was over Europe, something like 1 out of every 4 crewman killed.
ack-ack