Hello. I can say that the 2 DVD set Steve Lamade mentions is excellent, and worth buying. I know, because I own a set.
There are other Espada y Daga instructional vids out there. One is a new one put out by
Pete Kautz of Modernknives.com and alliamcemartialarts.com. Check out the sites for more details, it's new so I haven't seen it. Also Modern Knives issue #1 has some espada y daga as well, Cinco Teros (5 strikes). Good for a basic intro.
Kelly Worden has some on his "Water & Steel" video available from Paladin Press.
There is also a DVD put out by Dan Anderson (danandersonkarate.com).
Another one is from Unique Publications, actually 2: One by Edgar Sulite, and one on Kali
Ilustrisimo Espada y Daga with Master Rey Galang. This one I have as well, it's not a bad video, it's done well, but I would buy it used if possible.
That should get you started, and then some. Good luck