If you want to drive a nail into a piece of wood, don't buy a pair of pliers you buy a hammer. You can drive a nail with a pair of pliers, but a hammer is more efficient, getting the job done faster with less effort. Of course there are some folks that would prefer to buy the pair of pliers to drive nails with just in case by some remote chance they come across a nut that needs tightening. Me, I use a hammer for driving nails.
But what if I redesign that pair of pliers so that they now have a free hammer attachment that does not impede the regular use of them, but also adds a good hammer function? Cause that is what the DSLR with video is - ok its not a video camera and most photographers are not great videographers on their first go (its a whole other world of skills and methods).
It's already been done. It is called a fencing tool. Trust me, I have many years of experience with them. For fixing or putting up new fence they are fine. They hammer, grab, twist, cut, and pull as needed. But for building a house and hammering that many nails, I want a real hammer. They are not comfortable for all day hammering and will wear you out.
I understand what you are talking about and if it is something that is just for fun and you don't care about getting the best quality from the final product or the extra trouble you have to go through, then that is fine. I use the tool bit because I am also a woodworker. A few of my woodworking friends have the Shopsmith Mark V. A combo tool, as they do not have the space for dedicated tools. Every one of them would rather have dedicated tools if they could. Fortunately I do have the room to have dedicated tools. The tools are easier to use and quicker to set up than the shop smith. The downside is I don't have the room to set them in stations. I have to roll each tool out as I need it, set it up, use it, put it away and pull the next tool. In the old house I had a large shop outback of the house. Every tool was set in it's own place. I took work to the tool instead of bringing the tool to the work. Quicker and easier to work with.