People post videos to YouTube or Google Videos. They did not post them to your blog, or mine, or anybody else's. But other people use the code to embed that video onto their own sites. Is that a copyright violation? What do you think?
Alternatively, we insert links to videos on our sites and/or blogs; is that different?
What if it is text, rather than video? If I "embed" a print work on my site, is that OK? What if I simply link to it?
Have the technological possibilities altered the copyright rules?
My opinion - linking does not violate copyright; it is like saying "go here if you want to read/view this." Embedding, however, is a murkier issue. The content actually becomes part of my site, even though technically it still lives on the original site and is referenced by the embedding process. But to the visitor to my site, it is right there. Any ancillary information that the original poster may want to convey is not.