I just tried this for the first time yesterday and kept getting the "Could not open input file: AdobeHDS.php" error myself.
This is how I got past that error:
If you go to
KSV's Scripts page, you'll see a hyperlinked "AdobeHDS.php" at the top of the list. Click on that and it will open up a page with a window containing all the text of the AdobeHDS.php script. Copy the complete text to your clipboard and paste it into a new text file, then save it as "AdobeHDS.php".
When I put it in the C:\PHP folder, the error didn't go away, but when I put it in the folder I run the manifest command (in a batch file with "pause" on the last line so I can see any feedback before it disappears) from - it works without the error.
Now if I can only figure out how to download more than just the Keyframes - which basically just makes stop-motion video, LOL.