On March 2nd, 2016, YouTube has decided to change the way they do their channel layouts. Unfortunately, this is causing issues on “older” style layout channels by showing “This channel has no content” This seems to happen only on computers, as the mobile versions are just fine.
Go to your channel page and click on the gear button on the right.
Click on “Customize the layout of your channel” and “Save”
And viola, all of your content is back on your channel! Now you can add sections for “Uploaded Videos” or your specific playlists.