https://fishduck.com/2016/02/i-fell-in-love-with-a-defensive-system/
this sums it up decently well and its just 1 of the first few articles I just now googled. It's a little aged so the defense has changed a little bit. Brent Venables runs a lot of cover 1 out of it with 4/3 over, but I think its based on the same alignments.
As a side note. If you search up quarters high match-up zone you will get a whole lot of pat narduzzi, but there are quite a few really good breakdowns too. Some good videos on youtube breaking down fronts, personnel groupings, stunts, etc.