I wonder why Poet did not put this video out themselves??

My guess is that because they knew someone was making a video of the meeting, they knew it would reach us one way or another. Saves them the trouble of issuing a NR and lets them keep up the blitz on the presentation front. Also, if GT was with them, that means he's not in the lab; if he's not in the lab, that means he doesn't NEED to be in the lab (at least prior to the release of the news of the next milestone).