Spinning violently

Brand:Samsung
Model Number:WF42H5000AW A2
Main Symptom:SPINNING VIOLENTLY
What happens & when:spins out of control I checked the inner tub as you can see in video and it feels tight I changed all four shocks from Samsung

So I like to know what else can cause the imbalance other than the spider arm in the back before I order it and take it apart Please

Thank you

Error Code (if any):
Parts or tests already tried: four shocks
Photos / video link:https://youtu.be/4ILJoTv_Vx8?si=gavRt76pHLvZOWqe