I listened to “Singularity”. I realize it was serious, but it almost sounded like a parody of transhumanism. In theory, I have no objection to uploading, but it’s viscerally unappealing. Imagery about becoming ones and zeroes does not give me a warm happy feeling.
Your metaphor about light is a much pleasanter one. I can imagine that a love song might work, too—“I still want to know you in 3,000 years” or similar.