I see you posted a little while ago, but if you're still looking for an answer, yes, you can download and save the videos on those sites. As I remember, you can choose from several quality/size options. I think all the videos on those sites have a watermark, if you care about such things.
I find the website thebestporn to be a good place for reviews of subscription sites. Very detailed info about what you get for your money.

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