It can. He is cow hocked, and very loose in the back end. It can tighten up some. A lot of puppies will go go go way beyond what they should. Your puppy stops and waits. A few times I saw him looking back to you, which means he might just be attached to you and does not want to go too far without you being there. It can also be that he is tiring or having some pain.
At his age it could be pano too if he is in pain. I would definitely do pre-lims on him. But I would wait until he is at least 6 months, maybe a year old to do them. I would also follow whatever regime there is for healthy hips -- diet, moderate regular exercise, staying lean, not encouraging the dog to jump or running the dog on a hard surface.
BTW, that area looks like Puppy Heaven.
Jenna, RN CGC & Babs, CD RA CGC HIC
Heidi, RA CGC
SG3 Odessa, SchH1, Kkl1, AD
Ninja, RN CGC & Milla, RN CGC
Joy, Star Puppy, RN CGC
Dolly CGC & Bear CGC