Engine Problems...weird clacking noise... Videos inside...help

[old man roger]

hhmmm good compression check confuses me here , i would have bet it was a bad valve ..

i just had a thought you may just have a wire on the wrong plug , i have got my spark plug wires mixed up on a car before and it would idle perfect but as soon as i started to rev it it would sound like some one hitting the top of the piston with a hammer because the piston was still coming up when the sparkplug fired