The Ready State Virtual Mobility Coach is like having a virtual Kelly Starrett in your pocket.
You address where you will see the biggest change first.
Do you have restriction at the hip?
If addressing your ankle first works then do it.
Placing a weight under your heel changes upstream positioning at the hip.
Here is one that can give you more info on hips vs ankles
Squat Quick Test: Is it Tight Ankles or Tight Hips? | Community Video