There DEFINITELY WERE videos in the very early days of PixInsight LE
I have four of them on my hard drive :
"Basic Levels and Histograms" 15Mb
"Previews" 14Mb
(-not sure-) 5Mb
"Process Icons" 13Mb
The videos are all between 5 and 6 minutes long, but are pretty 'poor' quality.
When played, the PI LE title bar displays "Pleaides PixInsight LE 1.0"
The commentary is in English, with an American accent - but I do not know who made these videos
All that said, the recent 'computerised' videos provide FAR, FAR more information, in MUCH HIGHER quality.
Hope this helps.
Cheers,