Hi brano,

1) Is there a way how to tag multiple pictures at once? i.e. from thumbnail view select more than one picture and then assign a tag? ...or what would be the workflow to accomplish this shot of clicking on individual images?

On your Piwigo, page [Administration > Photos > Batch Manager], you can do exactly that action! (and others)

2) Is there a way to make only some pictures visible to some users based on tags? Or is there a way to create new album based on tags? I could make the album visible to user then.

You can't have permissions on tags, only on photos or albums. But yes, you can use plugin SmartAlbums to create an album on a tag and make this album private and granted only to a list of users (or groups of users)

If you have questions related to the hosting on Piwigo.com the best is to ask on https://piwigo.com/contact

brano wrote:

does the library handle video files?

[extension by xbgmsharp] piwigo-videojs

@mmoy, that's half-true actually :-) VideoJS and video upload is available on Piwigo.com Enterprise, but not on the basic plan for individuals. In the future, Piwigo.com may unlock this plugin for individuals, but under specific conditions (disk usage mainly)