Remote Buddy will search the paths you manually specifiy in a 
recursive fashion - which means it'll perform a complete search of all 
of your disks if you add "/Volumes".

I've just tried to find the VIDEO_TS folder on a DVD in the drive and 
I too couldn't find it through Spotlight. So I guess this a general 
change in Leopard's Spotlight.

I'll see what can be done in terms of manual DVD insert/eject 
detection and a quick search for a VIDEO_TS folder on the volume's 
root level.

Best regards, 
Felix