I really think this is a problem with the disc Avatar itself.
Type "Avatar DVD won't play on PC" into Google and see all the hits!
I think the DVD has anti-duplication code on it, that blocks PC playback.
Sony used to do that with their music CDs a while back so people could not put them on computer too. I think they were sued, and stopped doing that with music CD. But Avatar is Sony video, and I'd suspect them of it strongly.
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Weezie looking at petunias 8.25.2017
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