Sequencer API and using custom Actors in Sequencer?

The other side of this which I still haven’t figured out at all, is how can I respond to an actor being added to sequencer to allow me to do some custom stuff, and how can I programmatically add keyframes. For example, we want to be able to drop a camera into sequencer and have its transform and other properties autokeyed base on metadata.

Really struggling due to lack of documentation (that I can find at least) and unfamiliarity with the code. Would be very helpful if I could get some help from someone who knows, or an Epic developer.