[FlashGit]

I didn't watch the whole thing just jumped around but he has included slides that are marked 'SECRET//NOFORN' so if that material is accurately classified at that level (and its disclosure was not authorized), well he probably shouldn't be presenting to that.

Of course whether those slides would cause 'serious damage' to national security is a whole other matter or maybe it was 'authorized'.

[willstrafach]

All classified slides shown were from Snowden. One unclassified (but marked "Law Enforcement Sensitive") slide is from elsewhere.

[TaylorAlexander]

Perhaps they were previously leaked through Snowden or others and he's only included them in his slides? Then he's not disclosing anything. He hasn't worked at NSA for a loooong time.

[FlashGit]

I'm no expert, and you are right he did leave sometime ago, perhaps there were changes with regards to protecting classified information after he left.

Classified information does not become unclassified just because it is publicly available if I remember correctly. Either way, I can't comment on whether including them in his slides is disclosing/divulging or not.

[zeep]

Around 7:30 he says that he is using some documents that were leaked by Snowden.. maybe that's them.