Drone transformation directly over my head

Drone transformation directly over my head
Time: 02/15/2025 at 7:37pm
Location: San Diego County

First time posting - I joined Reddit and this community based on what I’ve been observing in the skies for the past few months. Highlights from video:

- initially looking at two drones overhead 
- focused in on one that appears as a single bright light directly over my head but completely silent 
- transforms into triangular lights and begins to become audible once transformed