Found the first HD torrent for the show, 4GB:
https://rarbg.to/torrent/gkhqnwf
If it doesn't load the page because in your country it's blocked, don't worry, go here:
https://torrents.me/proxy/rarbg/
choose one of the not blocked pages on the list, type the file name on the search bar (Victoria Secret Holiday Special) and you should be able to find it in the search results.
Open it, and click on the Magnet link (it looks like a little red magnet, yes, up near the file name).
Your torrent program (uTorrent for example) should open and ask you to start the file download.