I have an idea but I have no idea how it will be

May be an api that tells you the players which civs choosed before game when game running.

This way, players who broadcast Twitch can add a banner about of civs Because one of the first things everyone wants to know about in all AoE Streams

Or differently It can also be added to the section on the 'Live Stream' tab on the personal profile page of the Voobly site.because While the game is playing, there is some rating information .

after that it would be possible to develop a tool for use in live broadcasts and it would be really cool.