Denim's continuing to be the provider of this service might be dependent on the quality of service provided
Both yes and no. I believe Denim Air's contract with Arik Air will end when Arik receives the Q400s (said to be sometime this year) nomatter how good or bad their performance has been over the contract period.
To the issue of the video: We have all, at some point, pulled out the camera in the cockpit, and we would not make any comments to it. But shooting a video is a different ball game. Flashing it on YouTube is in my mind nothing less than stupid, and is certainly not going to enhance your CV for the two young pilots.