Any ideas where I might find photos or video footage, or even storyline of a hilarious past incident?

During a parade in honor of a visit by Japanese Emperor Akihito to England in May 1998, the Queen’s Royal Scottish Guard briefly bared their backsides in a well-orchestrated mooning to protest his lack of response to the atrocities inflicted upon UK citizens during WWII. I saw video of this briefly on the news in 1998 and could never find it again. Any suggestions where I could find imagery,story? It seems to have disappeared completely.