I like the open mic idea. You could also capture the videos and post them into a playlist or even live stream them to a channel.

It may be wise to give somebody a "guideline" for the amount of time they should take. Keeping it to 15 minutes or so to make sure that there is plenty of room for other speakers.

I'm planning on attending Anarchopulco 2018. It will be my first year so I'm really excited to meet everyone and spend time down there.

Cheers :)