I bought a Samsung Galaxy Tab A with a SIM card slot 2 or 3 years ago for the almost same purpose you described: Recording games on tournaments and watching Netflix while travelling for tournaments (or going home to visit my family). As a Samsung mobile user, and therefore used to the UI, it worked perfectly for this case (and still would if Covid hadn't cancelled all travel plans in the past year and the forseeable future). So I can definitely recommend this series, it's good value for the money. Before I had a Samsung Galaxy S Tab (don't know which one.. 2?) and I can't say that there was so much of a difference, actually. I'm also happy I invested a bit more to get a tablet that doesn't only rely on WiFi but has it's own SIM card. It's not necessary if you frequently use it in areas with WiFi access, but it's worth thinking about it.
Apple tablets and phones have the advantage that smart Go books (if you consider buying them) have a better app than normal epub reader (and a few more books, too), but if that's not a high priority - and it doesn't sound like it - then I'd save the money to travel to a Go tournament instead as soon as there's real board ones again.