But you video shows on a very high place in the game's feed, so i didnt check the date. Yes, maybe they changed it heavily. The swarms usually spawn in the same time like on 3-4 places around you. Yesterday i have seen this wave of exploders, and first time i had bad feeling about my team's survival.

This video is from over a year ago. The game has changed

this is nothing. How about a Swam of exploder making the floor to lava after they are killed and a full ceiling of glyphids over you, while you can only survive on ziplines. And then two heavy exploders spawn.....