How old is the bird and what is his diet? Is he defo a male?
Do the legs look swollen at all? Does he have a leg ring on? Can he grip your fingers with the same level of strength in both feet?Do you have any pictures?
What perches are you using?
Are there any sores or puffiness on the feet particularly the bottom of the feet? Does he show any signs of pain or discomfort when you touch the feet and legs?
Tbh it could be lots of things and by answering some of those questions we may be able to rule things out.
Good idea regarding the ear. Legs look ok, he does have a leg ring on but lots of space. He is male, can grip ok and climb seems a little less strength in the right foot. Does not seem in any pain or discomfort. Happy eating and drinking etc. Happy to send pictures
The difficulty with the ciaque is it can develop differant walks the one i had living with me walked like charlie Chaplin quite often, if it was a balance problem your bird can fall off its perch, it may of had a slight discomfort but i do not think looking at the video it is any thing to worry about