Good but filming it and putting it on social media is very wrong.
FYP
The kid is going to grow up and this will be with her for a very long time. I think this is an appalling thing to do to your child. Can see she gets her bullying behaviour from, parents can be such twats. He really should have thought through the consequences.
The punishment is fine without the cameras. From what I understand it was spread over 3 days, and a couple of miles a day for a 10 year old isn't very harsh.