what's wrong with the picture? a 2v2 game with a group of allied protoss + zerg and the group selection tabbed to the infestor unit
It's not allied, because the protoss and the zerg have the SAME player color. Presumably, the zerg mind-controlled a probe and built a Nexus.
Which, buy this point in time, the Zerg player could have already won the match using the resources on his already establish buildings and units.
He definitely Used Neural Parasite from the infestor and built a nexus in the middle of the map as you can see from the mini map and built a huge protoss base in his base to pump out those toss units.
Not really Lurkers it was a FFA match but both terrans at the bottom of the map were turtling quite effectively and since i normally go with terran i doubt i would've been able to overun them even with the extra rescources. I'm amazed zerg players don't use infestors more often, i realise playing 2 races (or 3!) is too much work for ranked games but infested terran swarming is also surprisingly effective and i've never seen anyone do it.