If you have the season 1 DVD, on the commentary for the Extended Pilot episode, Linwood Boomer mentions that they did two of the intro sequences (for the first season at least, I know they were updated for later seasons).
One of them was apparently done really quickly and cheaply -- in about 3 days and $2000, and the other was an 'expensive' version they used on Red Dress (and possibly the televised Pilot, but I only have the Extended Pilot on DVD which uses the old titles). According to the commentary, they actually ended up liking the cheap titles better, so used them for the rest of the season.
This seems to be those 'expensive' titles, which presumably were made to support widescreen in case they needed that. Good find.
As for the YouTube video's claim of 'HD' -- I'm doubtful. It looks merely upscaled to me and to my knowledge this was never aired in HD, so the poster of that YouTube video would have to have a copy that no-one else has access to in order for the HD claim to be true.