Seibertron have uploaded two of the video clips shown at the Generations presentation, and they should end up being uploaded by Hasbro eventually (if not already).

Combiner Wars promo video, featuring the Devastation Game.

Victorion design process, including the thought behind some of the character and colour elements.
(the video says it is the result of the second annual fan-vote, but that's incorrect, as it was voted and revealed in 2013, while Victorion was voted and revealed in 2015... with each toy being released the following year - but this could mean more fan-vote toys are likely in future years)