all of the STS videos i've seen are very interesting. it is tough to say if these things could be alien craft seeing as we are trapped on this planet
and have no visceral experience of being in space (personally speaking...)
in my human opinion it does appear that the "flashes" of light caught on these videos seem to represent independently moving craft emitting some
sort of light and performing some truly odd patterns of movement. i think its safe to say a fair amount would be satellites, space debris, and what
have you. Erratic movements can be chalked up as 'thruster fire', and seeing as the camera is not stationary as far as space is concerned this is
semi-believable. But, there is still a percentage of these objects caught on several STS mission videos I have seen which cannot be explained
logically in my brain.
It seems like a no-brainer to me that we are not alone in this massive space, and there are, presumably, spacecraft which intelligent beings, somewhat
like us, travel in. The problem with believing something so socially outlandish is exactly that; there is no socially acceptable proof that these
Beings and their Craft exist. Our governments unwillingness to share full information on our exploits and excavations, the real truth of our races
history, and the reasons why the public is so suspicious of them withholding information concerning extraterrestrial life and technology is a
hinderance to human evolution as a freshly budding intelligent race of the universe.