The recording will be available later, but if you're interested in enabling a global consistent view on hashtags, know stuff about DHTs or #ActivityPub relays, you can have a look at the paper: https://git.orlives.de/schmittlauch/paper_hashtag_federation/src/branch/master/paper_hashtag_federation.pdf
Please contact me about any questions, remarks or other feedback!
So here's a TL;DR:
The social network of the future: No ads, no corporate surveillance, ethical design, and decentralization! Own your data with Mastodon!