Are you being purposely obtuse? I don't care how the information is delivered (that playbook could just as easily be a 2000-slide powerpoint deck), but what's important is the amount of detail necessary to create and install the offensive system. I'm quite certain that most NFL playbooks are in presentation styles that players can flip through. Video works because it SIMPLIFIES concepts that are otherwise complicated. You and I both understand that it takes HUNDREDS of pages of text — written text — to create a 22-minute TV show. That if you went into production with a 50-page script, it would be an utter mess and impossible to do. The challenge to me is whether the foundational, not fun, building-10-different-blocking-schemes-for-each-defensive-front has been done before February of 2019 for this offense.