Ask HN: How do you keep track of conferences?

Particularly session video releases? There are usually at least one or two sessions at any given conference I'm interested in, but even filtering for quality + relevance I'm up to about 20 different conferences now.

(For the curious, for me this is WWDC, I/O, BUILD, re:invent, multiple O'Reilly & Usenix conferences, QCon, DevOpsDays, @Scale, Edge, Monitorama, Rootconf, STAR, STPcon, CAST, ISSTA, TestBash, ASTQB Summit, and AgileTestDays.)