Here is the link for the latest compilation of UFO articles, links, etc from Earth Rainbow Network, which I highly recommend.
From the current compilation, here are some interesting links for clips of very convincing looking UFOs caught on camera:
UFO videos shock England, real ufo - Watch it leave almost instantaneously
Fishermen capture military jets chasing UFO into Sea in Spain
Freakish encounter! Watch the key part of this footage in slow motion - astounding!!!
UFO Over Ottawa Ontario 2010