Try it on Demo Company: open Chrome's Network panel, load democompany.com, and select the first request. Its Timing tab names each step. The first answer is a 307 redirect to www.democompany.com.
The handshakes: TCP (RFC 9293), TLS 1.3 (RFC 8446), and QUIC with HTTP/3 (RFC 9000, RFC 9114). Browser II §2.5 draws the same sequence.
Light in optical fiber covers about 200 km each millisecond. The half second in the film assumes a 100 ms round trip; your own will differ.
The narration is a synthetic voice (ElevenLabs). Timing follows the narration track, so a recorded voice-over can replace it cue for cue using the transcript.
With Reduce Motion turned on in the operating system, the film keeps its fades and drops the sliding motion.
Set in Atkinson Hyperlegible Next and Mono, typefaces the Braille Institute designed for readers with low vision.