[James2001]

It’s worth noting that today is the 25th anniversary of the launch of MTV Base, MTV Extra (which became MTV Hits) and VH1 Classic.

MTV Extra began with various different programmes, but after a while just became unthemed 24/7 videos.

In fact it's interesting that long blocks of generic/unthemed music video strands haven't really been a thing for years on most channels, there's usually some sort of theme or chart going on these days, with the generic videos usually just being short blocks between them.