Compositing collapsing ground on to footage in 2.8?

I have tried to find a 2.8 tutorial on how to composite an animated fractured ground that collapses
onto footage but only find very old ones from 2.6. Its hard to follow as its very different.
Anyone know where i can find such a tutorial or vfx course. It can be a paid one also.

Here is an example of what i mean. Starts @ 7s.