An issue that we keep having with our video gallery is that videos on various media sites are deleted in time and reuploaded to those site. We try to check all videos yearly and correct all links. Having a mass of dead links on your website is a really bad idea for SEO and usability. This could be solved if XFMG would have a feature similar to xenforo's attachment cache. The option to locally store a cache of the video for a set amount of time or indefinitely.