Whilst the custom made shell holder as shown in the video is clearly the way to go to crimp any quantity of heel based bullets, I believe that it is possible to use the Lee Factory crimp die on cartridges the are too short by holding the assembled round inverted in the die.

This will involve a certain degree of care to position them accurately , and checking that the bullets are sufficiently firmly seated not to drop out dumping powder in your press and profanity in the air.