With so much content out there it is sometimes hard to find content that is actually worth spending your time on.
ng-conf released 66 videos in their last playlist
also someone gathered all the relevant resources for the conference available here
Here are a couple that I watched and found interesting or informative
Angular & GraphQL ... Apollo looks awesome, something I definitely want to try that on my next angular app / side project.
I use the angular-cli and I think it's awesome... but John Papa uses it more.. some nice tips
RxJs - as I don't get to develop in Angular on a daily basis, always good to get a refresher and learn new functionality
Some component design consideration from the guys on the Material angular team.