Peter Jaszi and Pat Aufderheide - two brilliant professors in Washington, DC, have just published a guide called Code of Best Practices in Fair Use for Online Video available here.
They had the input of such distinguished profs such as Pam Samuelson in this work.
It talks about what one can and can't do under American law in making online videos, smashups, parodies, etc.
A lot of what they say can be done in the USA won't be possible in Canada if Bill C-61 is enacted as is.
Canada still won't have a parody exception. Freedom of expression is still clearly trumped by copyright law in Canada. Although Canada's Supreme Court has recently signalled in WIC v. Simpson that freedom of expression may be given more scope than we had previously thought in defamation matters, we aren't there yet in copyright law and Bill C-61 may go a long way to shutting off that possibility.
So, read Peter and Pat's lucid and clear guide - and weep for what we don't have in Canada.