Weird sound after cold start
*The sound in question turns off around 20 sec into the video*
I have a 2013, Scion, tC, automatic with about 180k miles. Starting about a month ago, after a cold start the car will make a sound, which would shut off after a few seconds of starting and won’t come back unless the car sits for +15hrs. Was curious what this sound might be if anyone has any ideas lmk! I’d love to fix it before something bad happens lol. Never had any issues with it (so far), I don’t drive the car hard and kept up maintenance on it.
Edit: Added more clarification