How do I add a synchronized clip/angle to a multi-cam clip?
One (probably dumb) way to do this is:


Select all 11 clips again and create a new, temporary Multicam clip.
Double-click the temporary multicam clip and find out the exact timecode where the new, 11th clip was added.
Copy the 11th clip.
Delete the newly created temporary multicam clip
Double-click the original multicam clip
Navigate to that exact same timecode
Paste the clip into that location