Blogs, Youtube and Copyright

I was reading an article this morning about a guy in England who is being pursued by US authorities because his site linked to content that was still within copyright.  Read the article in any of the fairfax papers/online ” The unlikely poster boy for a culture war….”  http://m.smh.com.au/technology/technology-news/the-unlikely-poster-boy-for-a-culture-war-how-a-knock-on-the-door-changed-film-fan-richards-life-forever-20120625-20xcf.html and one response to it http://www.theage.com.au/technology/technology-news/case-against-student-an-outrage-20120625-20xcd.html

It got me thinking, am I breaching copyright by linking to/embedding youtube or similar  clips?  Probably not if the creator has put it there or has their own channel (eg PBS, Horrible Histories) but if the source is beyond this, as I am transmitting it further and I am not an educational institution (even if my blog is for educational purposes) I would probably breach copyright.  I came to this conclusion by reading the PDF attached to this site http://cci.edu.au/content/blog-podcast-vodcast-and-wiki-copyright-guide-australia I suggest all content curators who are doing similar things to me have a look and at least read pp. 51-64. So, I have been through my subject guides and taken out any suspect embeds/downloads.   I still indicate what videos you can find but visually my research guides are less interesting. I know as  TL I should have a better understanding of copyright (I know the 10%/1 chapter rule) but beyond this it gets very confusing, I suppose that is why they have copyright lawyers and specialists!  What is your understanding of copyright and blog content?