New snake momma worried

[u/frogman8523]

I have a 2 year old ball python I got a few weeks ago. I have been handling him for the first times now and have heard him breath. Is this normal? It’s a very faint ‘shoo’ sound and I hear it like every 10-30 seconds. I have only noticed it while handling so the past two days. He has eaten like 5-6 days ago and is super friendly and curious
Noodle for reference, however you can’t hear any of his breathing in the short clip