SO, i ran two cans of diesel purge through the system, the noise is almost completely gone at idle, but is still just as bad when you give it some throttle. Im not getting any smoke, nor losing any power. It revs fine, so im still baffled. from my very novice past experience of catastrophic internal engine failure, you can usually tell when it is something serious either due to a severe loss of power, smoke, heavy misfiring, etc etc. this confuses me because the car still seems to run great. I still haven't gone and re-adjusted (tightened) my valves, if that doesn't fix it, i would hope it just needs the injectors cleaned or replaced.

Here is another video. sorry for the poor quality, phone was too low on battery to use the flash so i was trying to wield the flashlight. also, the consistant "rattle" you may hear is my air cleaner housing. two of the rubber mounts are missing

https://www.youtube.com/watch?v=0M6JSKI4O4s