Jay, You can't miss with the recommendations above and "in person" instruction is always better, but if you want a good video, I recommend Lefty Kreh's......I've watched it at least a dozen times and always pick up another bit of info. What I like about his technique is that it's pure physics....small loops, everything efficient and focused on having the line go straight and out. Large loops on the flats are killers to distance and accuracy esp. with the wind factor. Others may feel differently, but it has been helpful to me.
I've witnessed Juro casting.....am wondering what the heck he would need further for certification as an instructor.