Hey man, really nice bench, 145 @71 is pretty sick. You're keeping your wrists in a good position and really using your legs well.
My one concern with how you're using your legs, is it almost seems like you're letting the bar dip a bit on your chest and you're heaving a bit. You may get called on that. I'd recommend just keeping a bit tighter when it gets on your chest, and drive back with your legs instead of straight up. You butt may be a concern as well.
Remember, practice the way you want to compete, so if your butt is coming up now, it may happen when you're under pressure in competition.
The other thing I noticed is that you're losing your upper back when you unrack. Just get someone to hand off to you, doesn't matter who it is, it can be an old lady and that would be enough, but you have to keep that upper back tight.
Those are really the only 2 things I'd advise you to work on.
Great benching, good luck at worlds.