OK, so I have done it again, with a bit of help of AgX
Here is the full translation of the Gevaert film's Dutch narration in English
There may be a future subtitled version of the video down the line. I contacted the public broadcasting company hosting the current video, but more importantly also the national archive for this material (Instituut voor Beeld en Geluid) here in the Netherlands, and the latter party has the video available for sale on DVD for a reasonable price, but there may be additional licensing costs involved in making it publicly available on the internet, in which case I am not going to do it. It will depend, it is a 50 years old company video, so maybe there aren't actually licensing costs...