Very upbeat theme for a news bulletin.
Central had quite an experimental approach to overnight continuity at the time, using special idents to combine various presentation elements. So the one at the beginning of that video was a Central Presentation endcap, ident and news intro all rolled into one, with no CA
I guess the idea was to give some flow to the overnight sequence and avoid the need for an announcer. The trouble was though, as you say, Central’s ident music was all quite jaunty, and so could seem a bit jarring going straight into the news.
Incidentally (and apologies for going off in a tangent), Central overnight in the early 90s was the first time I ever saw the use of IPPs on British TV, with Next and Later astons used to promote upcoming programmes on screen towards the end of some shows. Had anyone else ever used them before?