ghostfreak, I actually had to read your post twice to find out why you're so disgusted with your husband.
As the others said, it's pretty normal for guys to look at porn in some sort of form as they're visual people (we girls have a better imagination then men)
As long as your sex life doesn't suffer and he doesn't prefer to watch porn rather than fiddle with you, I guess there's no reason to say it's an addiction. Also, the video you found features sex between hetero couples (pretty normal, no?) and doesn't exactly contain sex scenes with children, animals or mutilation acts.
I think you should examine the relationship with your own body and the way you feel about nudity, sexuality and graphic display of organs we all have. It seems like you are quite squeamish about something considered natural (penetration and various ways of feeling sexual arousal) as well as the men and women are built (penis, foreskin, vagina, anus). If you're flinching now, I'd try asking yourself why you are disgusted with something so natural.
I agree it doesn't feel nice to find out that your dp has hidden this video from you, but given your attitude to sex I can totally understand why. Don't give him a bollocking, ask him what he likes about it and learn something new.
Littlewoman, you've described it really well. There's nothing to be worried about ghostfreak.