Made just a few years after the Roswell incident, it gives an early view on the phenomena and some of the pop-cultural impact. Nothing in here that haven’t been discussed to death since, but it’s a curious look at a different time with perhaps many of the same questions we have today.
The initial craze was likely due to the novelty and excitement surrounding the issue. I believe it died down because the government did an effective job of downplaying and stigmatizing the topic. As for the resurgence in the late '70s, I theorize that it might have been triggered by the alleged abduction of Travis Walton, but that’s purely speculative. Who really knows?
That’s an interesting theory. We do know that the government has, at times, sponsored movies. However, to assume that they had any input or influence on films concerning the phenomenon would be pure speculation.