That’s perfectly fine. If it’s for your own use, you’ve paid to look at it, so saying you can’t screenshot it is like saying someone gets to require you to have internet to view their stuff a second time. Doesn’t sound reasonable, right? Are usually do it once with my phone and once with my computer screen, then put them both on my computer and see which one has better resolution, then delete the other one. It seems to vary which one captures it better.