The first video is by Slatester.
Embedding in external sites was disabled for NASA Kennedy’s best video of Discovery’s liftoff, so here is a link: http://www.youtube.com/watch?v=RxFwUG9PiYM
This is an alternative viewpoint from NASA Kennedy.
The third embedded video was shot by a passenger on an airline.
“Those on the right side of the aircraft can see the space shuttle. Those on the left side can probably see the people on the right side looking at the space shuttle.”
— Airline Captain.
Here is a link to a similar viewpoint taken by some skydivers: http://www.youtube.com/watch?v=1v-knuBfKiA