I was wondering this too.
This isn't a direct answer to your question, but a quick search turned up this article for finding unsecured assets in a Google bucket https://www.andreafortuna.org/2019/08/07/some-useful-tools-f...
This isn't a direct answer to your question, but a quick search turned up this article for finding unsecured assets in a Google bucket https://www.andreafortuna.org/2019/08/07/some-useful-tools-f...
What would be the value? If my family members send a link to someone else, that person will have the link forever? If the unauthorized person has a link to a video, they can simply download that video and keep it forever anyway. They can't retrieve other videos in the bucket unless they can correctly guess their (not very predictable) filenames.