Determening the Noise advice

I have this 287 mopar motor with a overhead cam shaft. I recently rebuilt the thing and I have this noise on the right side. It sounds like its coming from the valve train. Can it possibly be a lifter or could it be a wrist pin slap. Does anyone have any advice on how to determine what the noise is so i'm not just replacing parts that dont need to be replaced. I tried some additives for lifters but it didint actually do anything. Can anyone help me out. Can it be anything else except those two noises. The heads I got from the alabama cylinder head company. They seemed ok but im not sure of the quality they make. Can anyone give me some advice and point me in the right direction

 

video it, post it on you-tube, transpose the video, and you might could get it narrowed.