If you want to add a channel you have to enter the ID of the channel in the “search” field and select “Channel” in the “type” select box.
You can find the ID of the channel at the end of the channel URL. For example, for this channel:
https://vimeo.com/channels/513799 you just have to enter “513799”.
For the other types of choices (User, Group, Album), it is the same process than for Channel. Just enter the ID that appears at the end of the URL.
For example, to import all the videos of this user:
https://vimeo.com/user24085556
enter “user24085556” in the search field and select “user” for the type.
For groups, this can sometimes be a word instead of an ID.
For example, to import all the videos of a group:
https://vimeo.com/groups/motion
enter “motion” in the search field and select “group” for the type.
For albums (now known on newer accounts as showcases), you can add the ID from the end of the url.