The correct answer to the Going to the Performance Surface Quiz is Illegal. Rule 6 states:
A Supporting Dancer(s) may toss an Executing Dancer provided:
a. At least one part of the Executing Dancer’s body is at or below head-level at the highest point of the released skill.
b. The Executing Dancer may be supine or inverted when released but s/he must land on their foot/feet.
c. The Executing Dancer may not pass through an inverted position after the release.
The skill in the video passes provisions a. and b., however the executing dancer passes through an inverted position after the release and so breaks provision c.
The explanation is based on the 2017-18 version of the dance rules dated August 30, 2017.