If I stole your photos and published them in a photobook claiming them as mine, would you hold the publisher responsible?
In that you are the publisher in that instance, yes :-D
Photobox (for example) can't be regarded as a 'publisher' in the proper sense of the word, if they were producing 1000 copies of your photobook for resale then they would be.
-edit- to clarify, I assume you're talking about vanity style photobooks here i.e. photobox and the like. They're more akin to printers than 'publishers'.
Sorry, I meant printer, not publisher.
YouTube is publisher in this instance no.
I'm overcome with sympathy for the poor souls at Google - they can have everything for free - is that what they want ? - original creativity at no price - Sergey Brin can make more billions while struggling artists in all mediums wither or starve or just give up.