Economical replacement rocker arm set?

With the rockers being lose like in your video, there isn't ANY preload on the lifter. The retainer is taking the load ie, holding the lifter together.

I had the same problem. PUT in all new push rods, no change. I could have tried new rockers, or sized each pushrod,or just got pushrods that are .020 longer, or, or, seemed like a pain in the *** and a bunch of guessing . I opted for adjustable rockers, problem solved.

As others have mentioned, the cam could be on its way out? Even with proper break in, the cam could be going tits Up?