So it looks like some of Sean's videos were subject to a DMCA complaint, and those show a notice of the complaint when you visit the URL for those videos. The rest of Sean's vimeo videos are just showing up with the "couldn't find that page" notice. Even his home page at https://vimeo.com/nutcracker123 is showing up as not found.
It's sad that people can't exhibit their creativity with lights without invoking the ire of the recording industry.