ahh, good to see more people getting interested in fillipino martial arts they are wonderful - hope you end up being able to find a school and enjoy your training as much as i have.
dont really know for vids or books, find whatever you can get and look through it, if you already have a fair bit of martial arts experience you should be able to figure out the odd trick, but its still no where close to substituting for actual instruction.
the best style i have seen/practised is pekiti tirsia, very vicious, very knife orientated and very simple....ok just one more "very" and im done [IMG]http://www.fightingarts.com/forums/ubb/wink.gif[/IMG]
as i understand, dog brothers has a fair bit of pekiti tirsia in its influences, one of the top "dogs" (actually i think it was "top dog") was a personal student of leo gaje - grand tuhon of pehiti tirsia.
personally if i could find a dog brothers group id start traiing right away, they have a reputation for being crazy but effective
my main experience is in kombatan arnis, fairly basic moves, some garbage in it, but great to integrate with another martial art.
the most sport orintated style that i know of is doce parez, very big on tournaments and light strikes to gain points rather than smashing a stick into someone to cause damage to a person - but the sporting emphasis could be very different from school to school - so don't take that as an absolute statement.
as for kubotan/yawarra - this sort of thing is done in fillipino arts, and is very simmilar (in my use and preference) to using a knife in the downwards or "icepick" grip. imagine using a hammerfist (using the bottom ridge of your hand to strike downwards on a target) with a knife or kubotan inside it. the hammerfist itself is a great attack anyway.
the kubotan is also used for thrusting and holding into pressure points, ie like if you were using your fingers - just put it where the fingers would go
if you can set up some sort of target and strike it using the kubotan you'll be able to get an idea of how it will feel striking rather than practising on open air