2014 Prius V not starting and making noise near inverter coolant

seeking help to troubleshoot my 2014 Prius V (station wagon). It has about 120,000 miles and I’ve done all the maintenance on it regularly. For few weeks, it wasn’t starting all the time. I’d push start and all the dash would light up and I’d just try it again and I would hear a faint click in the rear and I knew it would start. Fast forward yesterday, it would not start at all, and I recorded making this noise. It’s the noise you hear as soon a as you enter the car with the key but it sounded like it was dying.

I pulled out my techstream and ran but I didn’t get any code. When I push the start button twice without having my foot on the brake, I’d only see the check engine light and that annoying noise. I’m attaching it. Any ideas what it could be? Inverter pump? Or fuel pump? Will be uploading video link shortly.

 

https://youtube.com/shorts/PNBH53hFBrU?si=uKmUsft8BkYAlIey

Hopefully you’ll be able to hear the whining noise.

 

I found a Reddit post that had similar noise.
https://reddit.com/r/prius/s/Ba7inU3Cwr
it pointed a dead 12v battery. It’s odd for me cause I had just replaced it 5 months ago not because I had an issue but I did it to narrow down my issues I was having which ended up being a blown fuse. Luckily, I bought the battery near my house and they’re going to replace it for me. More to follow.