That is horrible!
I am afraid we cannot help you with your request on this community forum.
Not sure if these videos are stored without a subscription, I am afraid these are only kept for 24 hours.
The best thing you can do is reach out to Nest support.
But if the clips are still available within the Google Home App have look at this article to download the video's and save them locally: https://support.google.com/googlenest/answer/9207572
If you have the 30-day free Nest Aware trial subscription, you have event video history for 30 days for events detected by the camera.
If you have no Nest Aware subscription at all, the newer Google Nest cameras and doorbells (those that work ONLY in the Google Home app) have free event video history for the most recent 3 hours. The older Google Nest cameras and doorbells save snapshots for the most recent 3 hours:
A Nest Aware (event video history) or Nest Aware Plus (24/7 recording plus event video history) starts saving history when you purchase the subscription; they cannot provide history prior to that.
We haven’t heard any updates from you. I’ll go ahead and lock this thread in 24 hours. If you're still in need of assistance, feel free to start a new thread and we'll be happy to help.