Denial of objections on the video of Hazrat Khizr Alaye hi Salam

Assalam u alayekum!
May peace be upon you dear visitors!
People who are objecting on that video of Cairo protest actually do not know the technical aspect of things.The objection which is making echo is that this may be the reflection of a lens.
I would say that reflection of a lens is'nt that much clear.In that video you can see the shadow of a horse.Secondly reflection usually vanishes or distorts in seconds.But that image was there for quite a long time.
Why are'nt Muslims accepting such spiritual things??????