What do you think of this idea as a form of mental exercise: watch vids of players, but try to read either player as the match progresses and try to get a feel of his style. Predict what moves he/she will do and in doing so think up what you would do in that situation and compare what you were going to do vs what the actual player did in response to the move you (may or may not have) predicted. Use the person you're reading and adapting to as your "opponent" and the other player as your "guide", almost literally like an autopilot. I hope that didn't confuse you, but to put it in another way: You pretend you're the player that you're using as a model or dummy for this exercise, and the opponent is used as another dummy but for reads/adapting. Heck, watch your own matches with this mindset and see if you notice any difference between your decisions now and what you did in the actual match then.
I thought of this way of training the mind from watching your vids vs DJ Jack. I've obviously been playing again lately and doing some wifi (and offline w/ DFEAR) training and I definitely have not forgotten to train my adaption skills, but because of the importance I put into adaption and reads, it's also subconsciously caused me to pay more attention into critiquing player vids, and as I watched your set vs DJ Jack I basically did what I described above and I found it interesting and helpful enough that I'm going to do this with other vids.
Now I'll admit this practice could be limited if you're watching sets you've already seen and memorized, so I guess your mind would put too much focus on what you know is going to happen next, rather than guesswork. It's really theoretical and it's something I haven't actively done until now but I'm already doing it with more sets and I'm going to see if this helps with adaption and reading in the long term.