The camera is the Media Gallery tool intended for used in other contexts. The editor tool bar is sort of universal, so it is not filtered. That is probably a flaw in the design.
You clicked on the Add Media link at the upper right and you were asked for where to add it and then selected this album.
I enabled categories last night and those may be more suitable for projects like watch papers. The differences are subtle, but categories of media have a similar meaning to categories in the forum area.