Is my Boxing technique wrong for MMA?

In all honesty no. You elbows should be more parallel to eachother otherwise you're leaving open to some lethal uppercuts. Plus you don't always have to keep your hands all the way close to your face because then it is difficult to get punches off unless you have naturally quick hands. You want to keep your hands up to point where there close enough to move and around your face depending on the punch your opponent throws. Plus you don't only want to work on your hands. The other 50% of boxing is footwork and hip movement it will help out in avoiding most punches so you can work your way on the inside. Just be sure to keep your guard up enough to where you can move your'e hands around fluidily. But from what I can see, and I'm not trying to disrespect you but you got a lot of improvements to make. It seems like you're forcing yourself to keep your hands in that position.