I'm no expert with videos but the inclusion plot on the table looks very clean. Also it's very evident of the warmer color in the video so make sure you or your Fiance is ok with that.
If you're even vaguely considering this diamond, please put it on hold. This is a lovely diamond and you and I have done all the work for anyone else who wants a great deal to sweep in and snatch it out from under your nose. We see this happen All. The. Time. on PS, so get it on hold, quick smart! You can always let it go if you change your mind.