A couple of the "don't do this" videos on you tube that deal with recoveries are pretty lame, inaccurate and misleading. For example, one where they are talking about how DEADLY WINCH CABLES CAN be... while using a snatch strap in the rigging??? And cutting through tow balls to make them break pretty much invalidates anything they think that they are demonstrating.
That however has no bearing on how terribly bad an idea it is to us a towball as a point to attach an elastic recovery strap. In this case, they actually add in a metal fitting that locks the towball to the strap, eliminating even the possibility of it not being propelled along with the strap as well as concentrating the stress on the neck of the ball far more than a strap would.
IF you only want to use it as a tow strap with no shock loading, like dragging a rig around at the shop, or loading a rig on a trailer... low load NO shock applications, than I would have no problem with it. If you ever tried to use it in even a semi-strenuous dynamic recovery that I was involved with, there would be an instant discussion/education and that strap would be put away. Or, one of us would immediately NOT be involved in the recovery.
Mark...