It's pretty clear why a lot of these "tackles" don't work, they're tackling way too high. Grabbing someone below the armpits, really? It might stop him from moving forward but it doesn't bring him to the ground and that is what you want. If you watch how rugby players tackle, you'll see how good, effective and safe tackling looks like. Thank God some football teams are starting to use this style of tackling.
These are profile tackles, which happens a lot in the box head on. Once you start moving outside the box to angle and pursuit tackling, it moves into roll tackling at the hip, like rugby.
All the drills where the player getting tackled is static and/or gets tackled straight on, are for all intents and purpose useless. If what you practice, rarely/never happens in a game, then there's no point. It reinforces bad form. It may make a coach feel good about his "coaching" but it doesn't serve the players/team.
Tundra I don't see the point in this type of form tackling, if it rarely (if ever) get's used in a game. This seems super theoretical with little practical application. The closest to real game tackling I've seen so far, is the tackling drills from the Seattle Seahawks that are now being used by a bunch of D1 programs. A lot of the stuff in this video feels like the 90's
Philippe Augustin hi there I can see your point when in full pads but how do you teach the the right tackling to kids with out showing step by step training ....