The videos for the Motif, Motif ES, and Motif XF came out an average of 3 months after the keyboards started showing up in stores.
Having shot videos for the Motif, the Motif ES and the Motif XF, I disagree with your timeline, but that is no matter here. Videos take time to produce. In the meantime for those who can read and get information that way, we have already begun tutorials on the Super Knob and basic programming of the Montage. This can be found here on YamahaSynth and in the excellent Music Production Guides.
Our first obligation was to prepare an execute a training tour for our retail dealers so they have an idea of what Montage is all about. We've done that - next we will be creating "the basics" of playing and navigating the Montage videos. Patience please. I don't have a date to give you but suggest in the meantime - the reading material. And posting questions here.