sick rooster still

[Bhart90]

He his unable to stand up and hold balance. And his feces has a slight heel of yellow to it and a little bit runny but not completely.? he is the only one out of our entire flock and has been isolated for treatment. https://youtube.com/85pX4OQvchw

 

[Wyorp Rock]

Your video link doesn't work. Photos of him and the poo may help.
Can you provide more information?
You say he is still ill - how long has he been sick - you have him separated for "treatment" what treatment(s) have you been administering and what for?
Can't stand and is unbalanced - has he had an injury, any sneezing, coughing, wheezing, runny nose, discharge from the eyes?
How old is he?
Has he been wormed?
What type of food/treats do you feed?
Is he eating and drinking - has he lost weight?