UPDATE: Via SDA who have the video in question:
The segment with Gilbert shows him and another doctor badly faking chest compressions and other life-saving measures on a live boy faking death in what can only be described as political theater. The video claims to be filmed by the brother of a Palestinian teen that claims the boy was one of two purposefully killed by a missile fired at them by an Israeli drone as they played.
[...] CNN editors who swallowed the story of the poorly-acted video unquestioningly—no doubt because it fit the anti-Israeli narrative familiar to CNN viewers and critics—have now pulled the video without explanation, correction, or retraction.
It has also been determined that the videographer who filmed his brother's "death" is the general manager of a company that hosts web sites for Hamas.
Fake but accurate! While the video is gone, the story remains up at CNN.