When I try to play this song ( http://projectdxxx.me/score/index/id/201b95bb11eb8d894899bf2006cbafce )
I end up getting stuck at the black loading screen forever. And also, the preview video doesn't work in the song selection menu. However the video works great on my video player (mpc+ffdshow), I've got no trouble with any other videos, and I already tried to redownload the video and the archive.
So I think somehow a PPD update broke the song :/ (it started around 4 months ago)

EDIT: opening the files with PPDeditor I can "play the movie" and see the movie with the notes, but I can't "play" it within the editor. Weird :/

Ah, it is because thumbtimestart and thumbtimeend are 0 in data.ini.
Try to modify thumbtimeend = 10 in data.ini

It works, thanks ! ^^