lol that was funny, i dont know that ppl actually doing that, that is very expensive trick to use, 25%lost cancelling a hatchery, thats ...75minerals, 75 for that evo chamber and 50 for the drone itself, the cost for those broodlings that survive for like 5 seconds ? is like 200minerals, thats the price of 8zerglings. the terran seems to be a little bit slow sealing off the entrance. imaging you need to have a few hundreds of mineral around to use this trick, at least 300 when you start the hatchery. Anyway that was funny to see it works.

cause chamber cant build on normal ground, they need creep, and making a hatchery convert that small piece of ground to be creep, but you must act fast, or the creep will be gone in no time, or if the terran moved onto the creep, basically your minerals are wasted.

ya, maybe the smartest move is make bunkers and put all your marines in it. those broodlings can do ~100 damage each chamber.