Did not realize this until today but youtube auto-translates the following Hans Hass full movie into english subtitles. Go to settings (gear-like button) and chose subtitles auto-generation and you can chose to translate german into many languages including english. Works well.
DIVE PRO TV channel
Mensch unter den Haien (People Among Sharks), 1947, Hans Hass
https://www.youtube.com/watch?v=4AnTpqv-V1g
Hans Hass Archiv
The Hans Hass Archiv on YouTube channel only has 68 subscribers but has 3 full movies. One from 1952 in English.
Hans Hass: Under the Red Sea (Orginal English Version 1952)
https://www.youtube.com/watch?v=szs6AOqPeEk