Temple Church London strange voice anomaly

I caught what I think is a strange audible anomaly on a 3-second piece of footage I filmed outside Temple Church in London in July 2023. At the time I was alone in the courtyard outside, but you can hear quite clearly what sounds like a person (s) walking indoor and a strange giggle. This is the original unedited video.What do you think? #unexplained #templechurch #occamsrazorpodcast #paranormal #skeptic #ghost