garrard 301 and its' restorations

i was looking at a recent  you tube video of a restored garrard 301 in action. the platter motions while playing an lp were  very "wobbly" and bouncy ,like it was tracking a warped record or a spring in the suspension was "detuned"  is  this an optical illusion or is this normal to the idlers ?. i've never seen this on a vpi ,acoustic signature ,technics 1200 direct drive , kronos ultra high end etc .