Strange, I have windows 7 x64, and no problem with videos
! Since the game uses the files on your hard drive, there shouldn't be any lag or frame skipping :S. Try installing a new codec pack, like klite codec pack?
http://www.codecguide.com/download_k...pack_basic.htm
Here is the link for the japanese audio, done by mizuno_suisei (page 7 in this thread) :
http://rapidshare.com/files/29951708...guage_Pack.rar
You don't have to change the exe, just replace cdaudio.mp3 and cdaudio.dat in the "audio" folder
(and maybe some other files, he changed a lot of things to match the japanese version, so keep a backup of your original files)
Have fun ^^!