So I started scanning videos myself since I got Adobe Premiere.
I got some really good results, and without me having to rely only on
my friend for scanning. (The process is difficult and time consuming
so it's understandable that he didn't want to do a lot of scans
unless the videos were good.) I posted the files here; my friend
found the information so thank you for that!

If anyone has actual Mk4 scans of the rolls then those would be
preferable to these but for video scans these are pretty good.
I'll have more coming as soon as I scan more rolls.

The software I use to scan is called PlaySK reader and it can be
downloaded for free. 

[ Visit https://github.com/nai-kon/PlaySK-Piano-Roll-Reader ]

Scans I make also may appear in my piano roll video series where the
scanner is credited and the MIDI file (and sometimes audio, too) is
available for free in a direct download link.

Piotr Barcz
https://www.youtube.com/channel/UCYvjAu5xehzgwO0pDAMAsNg/videos 

 [   Scanned from an Aeolian Hall video by Randolph Herr
 [ https://www.mmdigest.com/Attachments/21/06/14/210614_064718_Universal_303343_1914_Twelfth_Street_Rag_-_Bowman_-_uncredited.mid 
 [   Scanned from my own roll
 [ https://www.mmdigest.com/Attachments/21/06/14/210614_064718_Imperial%2007466%20I'm%20Following%20You%20-%20J.%20Lawrence%20Cook.mid 
 [   Scanned from my own roll
 [ https://www.mmdigest.com/Attachments/21/06/14/210614_064718_QRS_7174_1940_The_Great_Speckled_Bird_-_J._Lawrence_Cook.mid 

 [ A QRS 78 rpm phono recording of "I'm Following You", sung by
 [ Irving Kaufman, is at https://www.youtube.com/watch?v=5NtMtEOwt6Q 
 [ -- Robbie