It's probably fair to say that the firm won't be too delighted if more videos like this of the prince frolicking in the pool with his clothes on emerge, and it seems inevitable that they will.
The problem for Harry now is that while the photos and commentary that have so far appeared online project a fun and glamorous, if not totally wholesome, image of Harry's latest weekend on the tear, this new video, and another shot by Extra, speak rather more eloquently of the sleazy tack-fest the Las Vegas pool party scene really is.
First off, there's the audio. The pictures of the pool parties don't show the banging tunes that accompany even daytime Vegas pool parties, which make the vibe much more druggy, like a club or a rave, than British audiences would expect from the rather term 'pool party.' Note, we say the vibe: the Royalist is not suggesting Harry is actually using drugs.
Then there's the other punters. Let's be frank, heavily tattooed dudes and silicon-enhanced blondes in bikinis aren't exactly what the carefully-planned rehabilitation of Prince Harry from feckless parasite to charming international ambassador and official representative of the Queen really needs right now.
The bizarre thing is that although he appears incapable of stopping himself, Harry appears to be aware of the need to stop behaving like, and allowing himself to be portrayed as, a 23-year old reality TV star who just got their name on the VIP list for the first time.
Witness his comments to Canadian kayaker Michael Tayler, who asked him where the best place in London to party was: "I don't go out any more," Harry replied. "I'm too old."
In fact, 28 is pretty far from being too old to still be going out. But Harry is definitely too Royal to continue with these public displays of what we had all hoped was just youthful idiocy, if he hopes to continue to have a place at the heart of the British establishment.
Keep clicking for more photos of Harry and Ryan ...