In this scene, Daredevil easily picks up a 400 lbsweight bar and uses it like a Bo-Staff, swinging it at his foes (And probably killing them on the spot, but let's not think to hard on this).
Now, the scene doesn't indicate how fast Daredevil was swinging, but it has to be pretty fast, since he is master martial artist and the guys couldn't even react. Probably as fast as a normal Bo-Staff. I tried to look at how fast a Bo-Staff swing is, but I couldn't, so I had to check alternative sources. I turned to Baseball Bat swings, and I found that the best swingers around can reach speeds of up to 100 MPH or so. I don't think it is impossible for him to reach such swinging speeds.
http://www.beyondtheboxscore.com/2015/2/11/8010803/zepp-swing-sensor-perfect-game-100-mph-swing
So I am going to do three calcs. One Low-End assuming that Daredevil swung the bats at 12.43 m/s (The limit for Peak Human speed in this wiki), another Realistic End using 100 MPH (44.70400 m/s) and just for fun, a High-End not remotely implied by the narrative, assuming that Daredevil swung the bat at Transonic Speeds (Since he moves faster than bullets pretty much all the time).
Low End:
Mass: 400 lbs = 181.436948 kilograms
Speed: 12.43 m/s
Using the Energy Calculator, we get a total wield of 14016,4487535226 Joules. Low-End Wall level.
Realistic End:
Mass: 400 lbs = 181.436948 kilograms
Speed: 100 MPH = 44.70400 m/s
Using the Kinetic Energy Calculator once again, we get a wield of 88835,09786530441 Joules. High-End Wall level.
Unrealistic End:
Mass: 400 lbs = 181.436948 kilograms
Speed: Mach 1 = 340.29 m/s
Using the KE Calculator again, we get a wield of 10504952,906896465 Joules. Borderline Small Building level.
Meh, I expected Higher Results.