Sometimes I may want to unshare multiple projects at once. Being able to check box the ones I want to unshare, the press an “unshare all selected projects” button, would help save time
Same could work with mass sharing
Mock-up by me

But doesn't this take one more click than it would just to manually unshare all the projects? To unshare, you just click the “Unshare” link, which is relatively easy, probably the same amount of difficulty that it would to click all the proposed check-boxes (plus one more click to click the proposed “Unshare all selected projects” button).

Za-Chary wrote:

But doesn't this take one more click than it would just to manually unshare all the projects? To unshare, you just click the “Unshare” link, which is relatively easy, probably the same amount of difficulty that it would to click all the proposed check-boxes (plus one more click to click the proposed “Unshare all selected projects” button).

I realized that shortly after posting this.

It could work for mass SHARING tho, since you have to view the project page in order to share something. Being able to share multiple projects at once could be helpful.

Might be helpful actually, as it's one more button to click to be sure you want to unshare even one project. You can do this in YouTube Studio, it's called bulk editing. I wouldn't do the same for sharing as this may result in spam…?