Knocking sound

Hi, a month a go I replaced the rear struts, front lower control arms, and front stabilizer and their bushings.Then I took the car for an alignment and two days after that, I started hearing a sound under my legs from under the car when hitting the bumps especially when turning left and one of my wheels hits a bump. the sound also sometimes gets repetitive when going on an uneven or a bit bumpy road and it feels as if someone is hitting the car from beneath with a hammer. So I went to the mechanic and he said it could be the sway bar bushings, so I replaced them but the sound is still there, then he said it could be the front struts, so I replaced them too but still nothing, then he said it could be the inner CV axles of the driveshaft, so I replaced both driveshafts and their axles but still nothing. His last guess is the output bearing of the transmission to the inner CV axle. But I cannot trust him anymore after all this. Please help me find out
what could be the problem. Thanks
Here I made a video of the sound :
https://youtu.be/99yQ9TBHnbM