Wobbling harmonic balancer/ crankshaft pulley?
 

Here's a short video of what looks to be wobbling as the engine is running .. honestly I don't know what to correctly call the part that is troublesome .. one called it harmonic balancer another crank shaft pulley.. Should it be spinning true or is this an indication of an issue.? I believe the belt looks worn but maybe not needing to be replaced. Car has 77,000 and has had the transmission rebuilt 3,000 miles ago.. Could the Trans rebuild have caused this wobbling effect possibly ? Thank you for your comments .

There's no video that I can see...

IMG_2798.MOV
My mistake .. I don't seem to quite have it right ..

rjolly87- thank you for your interest - I can't seem to upload the short clip.. sorry about that ! seems a security token is missing .? thanks again

To be honest, the harmonic balancer appears to wobble on both of my cars too, if I am looking at the front face of it. When I look at the drivebelt groves however, it appears to be spinning smooth and true. The only way it could wobble would be if it were loose on the end of the crankshaft, or if the end of the crankshaft is bent. Both scenarios are extremely noticeable in the way the engine is running.

I don't even know of any reason why they would be messing with the balancer, unless they used the bolt to crank the engine over to get to the torque converter and flywheel bolts.