How does does one open a file in the GCP Storage Browser in a new tab, like the video…?
You can click the Download button next to your object, and your object (video, image, document, etc.) will be opened in a new tab. However please notice that:
If you don’t make your object publicly accessible, only you can see that object via what called "authenticated URL".
If your object is made public, then everyone can see your object via its "public URL", usually in the syntax of
https://storage.googleapis.com/<bucket name>/<object name>