im in the same boat but with S2 cams. when they were installed i was running 10w40 and after the the install i noticed the ticking. i changed my oil 2 days ago to the new amsoil 20w50 and now its very loud, just like your video. today i took off the valve cover and checked my lifters for and bolts for anything loose and everything was fine. idk what else to look into?