What is "legal" where you are ..or in China ( for example ) is different to where others are..does that mean that using someone else's content and work is right ? is it moral ? is it ethical ? would you let them use yours just because where they are it was "legal"..
And I use "theft"..because when you benefit from using my work, without my permission..even if it is only by outranking me for my own work ..that takes money from me, and bread out of my family's mouths..you are stealing from me ( or whoever you take the content from ) you are just doing it indirectly..
Furthermore, copyright law isn't a black and white science...look at google books, google images, google cache (in an frame no-less) or how google uses sections websites in their search engine result pages. Obviously certain amounts of copying and reuse is appropriate on the Internet.
Copyright law is indeed "black and white"..everywhere ..in the early days Goog got away with it because they ran their site and their crawlers out of an educational establishment ..and exceptions are made in international law for those ..they built their search engine and cache etc whilst hiding under the "educational establishment get out" ..then went they went independent they had so many lawyers that all of the smaller guys were afraid to take them on because they can keep you in court arguing until even your grandchildren have died of old age..and your family has gone bankrupt paying your lawyers to fight for your rights..so they"win" by default and force of more money for lawyers than any opposition can bring to court..*
What they do with cache and books* is still illegal ..and they have been told so in many jurisdictions ..including the USA..
You are just asking for advice on what you can get away with.."like how many cookies can I take from the jar if the jar is in x and I'm in Y and it isn't my jar, and not my cookies"..
Amazing how those who don't create, always think that those who do, should let them have their work for free, especially those who whine about their serps positions when the panda or some other algo change has passed by and they have gone down..
Only governments have the money to fight Goog over copyright..because governments have unlimited money for lawyers..governments have fought them over "books" ..and won ..
I'm "conflating" nothing..your original post is ten lines long ..only one line about getting permission ..all the others are how to "if you don't have permission" but "it is valuable" or you "really really like it" or "can you just embed it" ..
Everyone in the years I've been in this forum who has ever posted that kind of post is already aware of what the laws are and what is right ..they are just as you said you were looking for a "trick"..to let them use what isn't theirs..
Calm down ? you could be looking at something of mine on Youtube or elsewhere ..that you really really like or want to embed ..and I haven't got anyone asking permission in any of my hundreds of email inboxen..and I have some very very diverse sites in very very diverse niches and languages..
The free stuff that you can use is at wikipedia..or make it yourself..