remixed

Here is great resource for found footage videos (in all languages, with short texts in French) by Bruno Tracq, made for his students at ERG in Brussels. There is also a useful tools and tutorials page.
Includes many gems, such as Rian Johnson's fake trailer for his film Looper, made before the film went into production:

Everything is a remix

Kirby Ferguson's online video series, "Everything is a remix", contains is inspirational in both its form, and the ideas it presents. He is now working on a new project, so don't (or do) let yourself be distracted: you can watch the original videos here.
And the "references" page has some interesting suggestions for more reading (and watching).

Everything is a Remix Part 1 from Kirby Ferguson on Vimeo.