Here is a fairly decent video that I had not seen before. It covers a lot of well documented cases, it is not a full documentary (it is only 6 minutes) but it is very informative and thought provoking. it you want to watch or read more about each case you can find additional information on the landmark ufo cases, most credible ufo, mass UFO sighting pages.
A well put together short video that covers a lot of well documented cases from very reliable sources.
