Betsy:
Not meaning to pre-empt Jim's response, but I'm pretty sure that the answer to questions 1 and 3 is 'no', and I'm certain that the answer is the same for #2.
You're referring to the Betamax case, and what the Court said there is that copying of over-the-air broadcasts for time shifting purposes (as a subset of 'personal use') is not an infringement. The opinion suggests that there is a Constitutional basis for this right, but doesn't quite say it. However, no commercial uses were sanctioned. (Long and complex topic, boring for most non-lawyers.)
Since then, the Digital Millenium Copyright Act became law, and that made it illegal to circumvent any digital rights management program for the purpose of copying data, even if the DRM is preventing you from making copies for permitted uses and you're bypassing it to restore the permitted use. So, if most of the material is copyguarded, you probably can't get into it, and if you do, you're in a world of trouble. Think federal felony and lots of tight-lipped US Attorneys.
IMO, the DMCA is probably unconstitutional itself, but I doubt any one of us has the time, the money and the capacity for pain to challenge this directly.
HTH