Great video John! I've really appreciated everything you've put out so far. One point I'd make though is whenever possible - its a really good practice to have your lifeline come around the trunk, not just over a limb whether you're using DRT or SRT, so thats where having extra length in your throw-line is handy - you can use it to throw the throwball back around from the back-side if necessary. Obviously the size of the limb and your comfort level is the deciding factor. See this image from Jepsons tree climber's companion to illustrate the point:
In a SRT scenario if you were using a canopy tie, you would want your tie in such a fashion that it is cinching on the trunk not the limb, If you're using a base tie you'd use the side of the line that comes around the trunk for your base-tie, and your live side would be the side coming over the crotch. In a DRT scenario you'd generally pick which side would be the live end based on what's more convenient to your final position.
The main advantage of this - is that with your lifeline around the trunk, rather than just a limb - the load is applied to the trunk, and less so to the limb so you can tie in at smaller limbs while still having confidence that your tie in is safe.
I hope that's helpful for you (and anyone else using rope access)