For those curious, I have at long last found a library in RI that is offering access to the Alexander Street video database through July 15 as an educational resource during COVID-19 shutdowns.
Walking with Dinosaurs: Prehistoric Planet and tons of other titles are available to stream here.
The film is not perfect. An ideal edit would make use of both the Cretaceous Cut and the Prehistoric Planet narration. At the very least, the audio here would need to be paired with a replacement of this 720p video source with blu-ray footage. Perhaps I’ll take that on one day.
In the mean time, enjoy!