Deck Check - new method
I really like innovations to processes that have been the same for a long time, so I was excited to watch this video. I have a few comments/concerns.
1) This is great as an alternative deck-check technique for a judge who isn't as good at other techniques. I have seen some judges struggle to get quick at checking the ways I show them, having 1 more tool is useful.
2) Marking up the decklist is fine, but I would avoid large tick marks like you showed in the video. If we need to check someone's deck multiple times, this will make it difficult. Having multiple extra colors, besides red/blue/black, could help.
3) Maybe this is just practice, but 6 minutes to check a deck is still on the slow side. I know we have the potential to not award 3 shuffling minutes, but if your DC partner at a large event doesn't do it this way, you lose that option.
4) There is a lot more time risk for mistakes. If you miss a card or two, or mismark something, you may need to re-do the entire check. When I pile out a whole deck, if I make a mistake and put something in the wrong pile, I lose 3-5 seconds, not 3 minutes.
5) The fundamental reason I believe that the 1 pile for every card method is the best is that quickly sorting cards by art is the easiest. With this method, you still need to identify by appearance, but now you're needing to search for text on a page of similar text every time. With some practice this can be made better, but fundamentally I feel like it is more difficult than matching art/borders.