Case in point ... A good number of the folks here don't accept something like the Guardian video as evidence of an alien presence without questioning it. Thus far, there has been little if any verified supporting evidence to the idea that it's real while there has been ample reason given to at least question the validity of the video if not give credance to the idea that it's a hoax. This includes statements made after the fact by various people associated either with the creation of the video or with the perpetrator or both.
The statement "Extraordinary claims require extraordinary evidence" comes to mind and that evidence is yet to be seen regarding the Guardian video and many, many other videos & other claims. Without that evidence, they're just so much felgercarb.