I've posted about elite cyclocross here before - from the fan's point of view, it's some of the best bike racing entertainment. And the races last only an hour or so, which means you can watch the whole event. Some years ago, the elite CX races were dominated by battles between van der Poel and van Aert - before either of them were road racing- and those battles were EPIC.
And as a bonus, the full races are often posted on Youtube.
Van der Poel and van Aert have been largely absent from Elite CX for some time - partly b/c of the pandemic, their road careers, and in MvdP's case, his back injury last year, but THEY ARE BACK. This Sunday they will face each other (+Pidcock)
https://www.cyclingweekly.com/racing...down-on-sunday
I'm not sure about live broadcast, but almost certainly you'll be able to find a youtube recording of the race soon after it happens.
Here is last Sunday's race, where van der Poel raced cx for the first time in 2 years, racing against Pidcock.
(This is the full race - you can also find highlights if you prefer)