Let's get the obvious stuff out of the way first. The primary driver of watchability for a video is first, how interesting/compelling is the idea you are communicating. Second is the quality of the script. After acknowledging those two things we can dive into the technical morass that seems to surround any project that is made with fun gizmos and tools.
From what I know of the photography business and what I've seen and heard in the video business pretty much everyone is obsessed with cameras. It's a subject that comes up endlessly and one that gets argued all over the web. Which camera is best? Which files are best? Should I shoot 4K or 2K? Should we invest in Zeiss Primes or go all out for the Leica primes? Should we stick to zooms? Can a camera be any good if it doesn't cost more than $10,000? More than $2,000? Do you need to have a touchscreen? Is Canon better than Sony? Can a project actually be done with a micro 4:3rds camera? Will clients run screaming from the room if you aren't writing files to an external recorder? How will we mount the camera? What cage should we get for our camera? Is the rosewood grip better