From far away, it was a naked man pounding the sidewalk in public -- now TMZ has obtained up close video of Jason Russell's meltdown ... complete with four-letter words ... and the devil.
In this new video, Russell can be heard ranting to himself, dropping F-bombs, clapping to no one in particular, and shouting about the devil.
Russell was not arrested and won't be charged ... but he has been placed on a 5150 psychiatric hold.