Is my 91' idling/revving ok (video)?

It doesn't sound any different than mine. If they need adjustment now, then they needed it when you parked it.
 
Sounds normal to me too, the ticking sound sounds a little louder than mine, but seems like it was idling fine. Any fluctuation in the rpms?
 
Thanks for the responses. This makes me feel a little better. I've had the car for almost two years now. I haven't had the valves adjusted and I don't know when last they were adjusted (if ever).

I had oil leaking on the rear of the engine which would drip on the exhaust to create lots of smoke. This seems to have improved when I tightened the valve cover a little. Is it common for the valve cover to loosen itself? This happened after a track day last summer.
 
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