Dog body language experts, is this is a good interaction? What do I look for.

My dog is the puppy, I was alone in a dog park until someone else came with the adult male golden. The other owner didn’t pay very much attention, I never took my eyes off the two and I didn’t feel like anything was amiss, puppy got plenty of treats but other than that I didn’t push her to interact. My aunt saw the video and said she was worried until puppy walked away. what does everyone else think?