Numbers: the median mobile home page made about 70 requests and weighed 2.3 MB in October 2024, and 92% of pages load something from a third party (Web Almanac 2024: Page Weight, Third Parties).
text/javascript is the JavaScript type; RFC 9239 marks application/javascript obsolete.
Browsers keep a separate HTTP cache per site (Safari since 2013, Chrome 86, Firefox 85), which is why a shared CDN copy isn't reused across sites.
Try it yourself: in Chrome DevTools' Network panel, hold Shift and hover over a request. Its initiators turn green and its dependencies red.
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.