Bobbin from Spool Stand
The third way to wind a bobbin on The Machine is from the accompanying spool stand. So if you have multiple threads set up (like for using a twin needle), you unthread the machine and wind your bobbin through the tension disc as usual. Pretty straight forward!
Included in this video is a description of how to unwind the thread if it ends up nested under the bobbin wind table. Unfortunately, there is no way to demonstrate this technique intentionally, as mis-winding the bobbin tends to happen on accident. The number one rule in case of bobbin mis-wind is DO NOT pull the bobbin wind table off the machine. Remove the bobbin, snip the thread, then un-wind the thread from under the table.