Similar to most political alliances, the membership within the JW org is filled with different factions, each with their own set of expectations (or lack thereof) for what the faith is all about. The task for the leadership is to create one vision that gets everybody moving in the same direction, without much loss, and stability for funding.
It's more likely that the simpler, more media friendly approach will win over more people than they lose because of it
If they are moving towards a more casual type of JW membership experience then this is possible. They still have the problem of moving beyond the apocalypticism that defined the group for so long. I think of the video with a GB member casually suggesting armageddeon will be before 2040 is an example of how the family values christian faith ethos still isn't all that JWs are. Their media never told the whole story about who they are as a group, its also about the situation on the ground.
If they were a generic christian faith with non mainstream beliefs they are still faced with the same issue that occurred during print based era. There is no real structure for youth to become attached to faith. Videos are a disposable media. Use it up and move on. Video can also be alienating, because the only interaction is between viewer and the screen.
I'm nostalgic for the tv/video of my youth, but I don't think you can draw a straight line between watching videos and remaining committed to a religious faith in an ever increasing non religious world (at least western world).