The first one was taken from the Secret NASA Transmissions - The Smoking Gun Video, by a man who spent several years recording and logging thousands
of hours of NASA space shuttle transmissions.
I have no idea where the Ufo crash one came from...I found it searching the web.
Both of these videos have been discussed in the ATS archive threads. You can read what others think about them, and add a new post to kick off the
discussion again.