Song used is "My Least Favorite Life" by Lera Lynn.
"This is my least favorite life"
CRAF is looking sadly up at something.
"The one where you fly and I don't"
The thing he is looking at is revealed to be Cassini, who is flying upward, representing how Cassini was chosen not to be cancelled instead of CRAF.
"A kiss holds a million deceits"
CRAF's mission proposal, stamped "CANCELLED", representing how CRAF feels betrayed by NASA.
"And a lifetime goes up in smoke"
Various points in CRAF's mission fading away. (Him flying by asteroid Hamburga, his penetrator firing into Kopff to collect comet dust samples and him arriving at Kopff, from left to right.)
"This is my least favorite you"
It is the day Dragonfly was chosen to be Cassini's successor, and CRAF confronts him, swearing his revenge to him.
"Who floats far above earth and stone"
CRAF jumps at Cassini, ready to pin him down
"The nights that I twist on the rack"
A sleep deprived CRAF earlier on at the House of the Failed/Cancelled Spacecraft, writing down revenge plans for Cassini.
"Is the time that I feel most at home"
The frame of view zooms in on CRAF's revenge paper.
"We wandering in the shade"
Before CRAF was cancelled, CRAF and Mariner Mark II Rosetta are taking a stroll together, discussing their missions with each other.
"And the rustle of fallen leaves"
The camera zooms in on their feet while they're walking, representing how they were completely carefree before they were cancelled.
"A bird on the edge of a blade"
Again, the frame shows the paper called "Project CRAF" stamped "CANCELLED", representing how that carefreeness can be destroyed in an instant.
"Lost now forever, my love, in a sweet memory"
CRAF and Comet Kopff's hands reaching toward each other, showing how the chance of them ever meeting each other is literally "lost now forever."