Match cover is indeed a familiar concept in the cfl. The argos bend but don’t break played it a lot. And weren’t the first.
They played a lot of 30 front with mobile lbers dropping back too.
as jbr said the more you run the better. Play action also helps. You can time pa with breaks and freeze the D, pump fakes work as well.
If you watch the pass concepts in those videos what you see is a lot of crowded forms and concepts. Very limited crossing, motion, dragging etc.
mesh concept, a crosser from each side run towards each other close enough that they can high 5 is tough on mesh. As is delayed motion, and 0 motion (motion at the snap in stead of pre snap motion) as well as chip/block and release concepts, and rpo’s thrown at the largest coverage bubble. In general rub routes and layered crossing is the easiest way. Instead of trying to attack seams that don’t exist you force the defenders into extended trail position.
using less of a tight stack, with spaced routes makes it harder to defend. The field is huge and if you space close to evenly you force man cover.
You can also attack it on a personnel basis. Rb wheel to a vacated spot on a block and release, and routes that send the rb deep really mess up match cover. you can also force one of the better pass defenders to defend your worst target and force your their worst to defend your best.
To do this you need to get to the line quickly and have the qb/wrs adjust to alignment.
You can also start the passing targets in the back field and motion as late as possible into position. The more you do this the harder it is on the secondary. You can’t do it every snap by any means but it’s very hard especially in split field cover where one side would be man depending on the number of targets.
You can also run overlap patterns, the pattern match really depends on teams spreading their targets and not crossing the middle in a flood. So if you have 3 on one side and you have the outside and inside run to the same spot then run a matching route like an inside curl, then pause, then run an in and where the WRs read leverage and run against it.