Any ideas what this coughing might be?

The second clip is from the other day, we were chilling in bed and all of a sudden she starts coughing for ~30 seconds. The first clip is today, she was sitting in a chair under the kitchen table for a while and starts coughing again out of nowhere, also ~30 seconds.

We went to the vet yesterday and they said they couldn’t tell anything was wrong with her, they listened to her lungs but we didn’t do anything too intensive like x-rays.

Any ideas what this might be? Vet said to just continue monitoring, but I don’t want the issue to snowball into something bigger.