At around 6:21 in the video you select all of the vertices associated with the cap at the end of the pipe and are somehow able to snap that selection set to a vertex on the end of the bounding box with no problem and I can't for the life of me observe any keyboard shortcut or button press that takes place to make it possible. Clearly I've missed something along the way... Thanks in advance!
Hi Jeff, you can toggle snapping on/off by holding CTRL; this means that when you have the snapping 'magnet' on (highlighted) it always snap, unles you hold CTRL and if the snapping magnet is off, you only snap when you hold the CTRL button.