I cant view the vid right now but did you replace all the valve shims in the same spot you took them out? I thought I had a lite knock one time then I remembered I didn't replace the shims from whear I took them out from. I had to re-shim the whole head! I then re-blead the lifters, blead the timming chaine tensioner and removed the upper chaine guide. All the sounds went away after that. Just sayin