Just got my P4P. The "how to upgrade firmware" video discusses two methods for updating firmware: through the DJI GO app, and through Assistant 2.  What exactly is Assistant 2? A search of DJI.com yields ZERO results. I found some release notes but that's not a lot of help. I'm sure I'm overlooking something very obvious but I would appreciate a little bit of clarification.

It is software used to update your Phantom. You download the software and notes from this page, under the software section.
DJI Software

Oh yeah, it was right there next to the release notes! Thanks P4P+