Good video, that is way too much movement of your fan, way too much.
The fan needs to be tightened up. I’m not sure on an 80, but on my 60 it’s fairly easy to access the nuts in Stu…tight but doable. Someone with 80 experience will chime in.
Maybe check to see if you have a broken driver side engine mount. This would allow your engine to move upwards as you rev the engine, possibly causing moving parts to hit & make noise.