I've used Signal on few occasions in the past but his talk made me uninstall it. I simply do not trust him after hearing his opinions. I do not support centralization and other ideals he's now pushing (including the use of a phone number as Signal's primary ID).
The talk was mirrored on few channels on YT [2] and you can still see it.
[1] https://www.youtube.com/watch?v=DdM-XTRyC9c (it's a private video now)
[2] https://www.youtube.com/watch?v=Nj3YFprqAr8 (working link, who knows for how long so mirror it).