It is teaming and it’s not their first or second time. They have simple deal — Bigzerados on 1st place, Bigfoo on 2th. Whoever enters arena with them won’t get the chance to have any of place and deserved reward what you can see on linked YouTube video.
They use „alibi strategy” to not get Glory Point cut by hitting themselves 2 times but their deal and strategy is obvious and simple.
Based on „Banned players” forum post and multiple punishments — Elyos Governor doesn’t learn and he follows the path of illegal way of gaining Glory Points. Morever, he destroy like this fair players and Arena of Chaos and if you want to apply alone without friend his Aethertech Bigfoo you will end up frustrated and not apply again.
I guess it explain in second post about him made by Anxiety and answers of user Patoxx created Discord group to call players for application and entry, otherwise it doesn’t work.