Use the import channels page to add you new content.
Importing is done using a text format, just like this example between BEGAIN nad END.
Each channel consists of 4 lines
----------------------BEGAIN-------------------------
Channel Name
MPD URL
Key or Keys
----------------------END-------------------------
The last line is an emty line and consider a separator between channels
If the channel has multiple keys add them in this format:
KID:KEY|KID:KEY| ... etc