Both using who scored heatmaps and watching highlights and full matches. Who scored and other football statistic sites give good text & statistic overview of teams, but you have to watch at least highlights and some full games to get a sense of not just the philosophy and range of how a team plays but things like 'gergenpress' Hug the touchline you do see always so clearly from just stats.
The best method is to watch first halves until around 60 minutes then after subs happened these tend to be situational and may no reflect the philosophy of each side, I try to avoid games with early red cards also,
I'm really sorry I'm not getting any time to do this sooner. I think its best I try release some stuff when I'm home to see family at Christmas or get some real time off before. Just one hting after an hour i feel so tired and busy I can never find time to do this for my own sake of a Tactics Library
I want to make game specific .pdf again like for how my team Arsenal played vs Brentford which is a slight variation on what we normally do with two AM's and one DM sitting behind, no DM/CM/AM fluid system as usual and off the ball we didn't press as we normally do lead by our striker & Odegaard.