That was an exceptional first session. And, while it’s not the technique I prefer overall, it’s clear you’ve done an excellent job of preparing this dog for the work. I’m especially pleased with the fact you so consistently praise genuinely for compliance. Most men are poor at this.
Your fundamental obedience appears plenty good enough that she doesn’t need to be tied up. She sat firmly with no squirming at all, and showed a good solid hold. I would like to take this opportunity to mention some reasons why my procedure varies from what you're doing, and provide you with some rationale to consider.
I only use tables to save my aging back. I do not lash them to chains or poles, but rather rely on sound obedience work prior to beginning FF work. For the majority of my forcing I sit on a plastic bucket with the dog close to me at my side.
In your clip, note that as soon as the bumper is in the dog’s mouth you completely release the dog from your physical control. I’ll post a clip here showing my technique, which includes not really pinching the dog’s ear, but rather holding the ear flap between my thumb and forefinger and pressing it against a pressure point on the collar buckle for well controlled pressure. When the dog fetches I only release the pressure, while maintaining control of the ear. If the dog drops the fetch object (I use a paint roller for a host of reasons) I can instantly turn the pressure back on with no time loss. Timing is important in all dog training.
If, at the end of my sessions, I decide to throw a fun bumper I can do it with instant timing for effect, while not losing that timing through the need to unleash the dog from a chain or an kind of halter. Just some points to consider. Very nice job. It may be even better, but I leave it to you to decide on any changes you may desire to make.
BTW, I do use the "Hold" command in the early going, but evolve out of it as I go along. I want the function of holding to become a component of fetch, and I think that fairly takes some time and exposure for the dog to understand. Eventually I abandon in altogether.
http://www.youtube.com/watch?v=5mxo6wdHl2w
Evan