Note: The footage is run again at the end in close up. The ETVs appear to detect the firing of the pulse/laser/scalar weapon as soon as it it fired [this is the visible light flash] from earth and make dramatic adjustments. The beam can then be seen a second or so after. NASA claims that every item on this footage is 'ice crystals'. it is claimed that the beam may have come from a base in Australia. Search 'Pine Gap' on main site.
NASA STOPPED all live feeds after discovering a Canadian TV producer had collected raw feed from STS missions. Analysis was done on this footage - search site for "STS48".
They're everywhere: New footage shows numerous ETVs in upper atmosphere. See Exopolitics.org.uk.