It looks like just as the ball enters the picture, it is being sent into the right side of the lane and bouncing to the left. Like another thread recently suggested, make sure the ball is resting evenly against the two sides of the auto plunger and the plunger tip is centered on the ball.

You can physically adjust the plunger if it does not appear to be centered on the ball. If you loosen the screws inside holding the shooter housing and adjust, sometimes just a teeny bit, then re tighten.

Is it doing it on a manual plunge, or autolaunch?

I have had seen similar issues on mine. Basically my plunger isn't centered to the ball. Check that visually first. I noticed I had a bit of slop between the playfield and the sides of the cabinet. Pushing the playfield to one side to help center it basically confirmed the issue.

I unfortunately didn't find a pure fix yet for mine. I just re-adjusted my shooter rod tonight as yzfguy described. But check out those things first.

I had a similar issue with my Metallica, after I moved it from one part of the house to the other. I had Re-leved the playfield and began having plunger/autolaunch issues with the ball bouncing around in the shooter lane. Wound up being that although the play field was level, I had the casters in such a way that slightly twisted the cabinet. Was barely noticeable, and hard to pinpoint. I was spinning my wheels for a minute before I realized.. Something to check possibly before you further dig in to adjusting mechs themselves. Good luck!

HAVE THE SAME PROBLEM-IT WILL HAPPEN TO BOTH MANUAL AND AUTO

Need to make the same type of video but do it at the ball launcher and see what the ball does from the start. Might be ping ponging down the lane from the start.

Call stern help desk and ask them before you break something.

Do you have a shooter eject cliffy protector? My pro had an issue that when the ball was plunged it would do crazy stuff because it was hitting the corner of the protector as I had it in to far. If you have a cliffy, move it closer to the trough to avoid contact with the ball.

The auto plunger design on these Sterns are a joke. The amount of sided to side play at the pivot point due to the one sided hinge on them is ridiculous.

This happens on my new one as well.

Check this thread

https://pinside.com/pinball/forum/topic/metallica-weird-auto-launch-issue

Just had the same problem come up over the weekend. Auto fire still works great. Only happens using the shooter rod. Have a new rubber tip coming. Hoping that solves it! Machine has very few plays on it. Only had it since late Nov 2015. My distro has been extremely helpful which is cool