What did Capt. Kirk say?
"We need more power".
More speed too, it looks like blur vs focus. A higher F stop will help as if moves around in the water and if you have a platform to let the cart. roll off the focus point won't change as much as being hand held.
2000 740i-Annalisa and 2008 335i-Weebl. Weebl may wobble but has DTC