With the limited info here and being remote it’s difficult to diagnose. Keep in mind that upper end oiling is not only for lube, it also cools the value springs.
While developing one of our race engines we experienced value spring issues. The engine had titanium valves, shaft rockers and solid roller lifters. The geometry was quite good. We suspected insufficient upper end oiling. We had adequate pushrod hole area and the rocker oiling was correct. We suspected that it was a lifter issue. The lifter manufacturer insisted they were not the problem. After a couple of valve spring failures and a DNF, ultimately I insisted that we change something to increase upper end oiling. At first I was going to add valve spring oiler jets to the valve covers. While discussing the plan with the lifter-cam manufacturer he suggested that we machine a flat on the side of the lifters from the hole to the relief. That created direct oiling to the rocker. Problem solved. I never had a valve spring problem again with that engine program.
From your videos it looks like you are getting plenty of oil around the lifters but not enough at the top end but that’s just my guess. I had more upper end oiling at low engine speed than you show before I increase it to fix my problem.
The noisy top end could be a combo of not enough oiling and geometry or something else.