Longtime NFL Coach Mark Duffner (currently the senior defensive analyst for the Cincinnati Bengals) shows you some drills that he has used over the years to teach linebacker pass coverage and tackling if the pass is completed.
This excerpt is from his complete clinic on:
which you can view on Glazier Drive.
The coverage and tackling drills you will see in the above video are: LB M/M vs. RB, Step Replace Reroute Drill, Cover Down Drill, 1/2 Line Teach Drill, and trigger tackling.
The important thing is to take the drills and tweak them to fit your system. Or, use them to stimulate your own thinking and staff discussion to create game-applicable drills that fit your philosophy and coverage schemes.
The video clips are from live practices. In addition to picking up teaching points, you will also see the players making mistakes and hear how Coach Duffner corrects those errors.