The fact that this "greatest clips" puff piece has an aggregate rating of 7.7 at the time of this writing speaks volumes as to how inflated the ratings for a particular show can get. Yeah, I'm looking at you, shippers. You know who you are.... :)
There is nothing here that hasn't been seen before and certainly no secrets whatsoever. The narrator sounds like the same guy who intones "In another world..." at the beginning of so many movie previews. This is just a hack job of clips thrown together in chronological order without any special insights into the series.