UPDATE: I have, using PlayOn, captured the HBO Now open matte version of Jurassic World, and the results are honestly a little meh. PlayOn did great, though; the recorded version is indistinguishable (to my eyes) to the actual stream when put side by side, and the whole movie came out to just 2.88 GB.
I’m disappointed in the streaming quality offered by HBO Now, honestly. It’s really dang rough. I don’t really understand, honestly, as HBO Now usually looks great on my PS4. Perhaps the quality is limited on browsers?
EDIT: after some review, it looks like PlayOn might not have recorded the highest-quality available stream from HBO Now, so I’m giving it another go. I’ll keep you all updated on my progress. I think whatever happens, I’ll have to watch the finished product all the way through to make sure it didn’t swap streams in the middle. Basically, PlayOn just screencaps the video.