I think it's pretty convincing. But forty seven years later, the Kennedy Assassination yet perplexes the American psyche despite no real evidence of conspiracy existing. The segment above does not delve into the "grassy knoll" shooter theory although that hypothesis is likely unfounded as well. My guess is as good as yours.
And then there is Oliver Stone's JFK (great movie, really bad history) in a league all on it's own. Compare the absurdities in this clip (Viewer Discretion Advised) as opposed to the scaled recreation in the first video. Unfortunately, most people believe Stone's version only because it is the only one they are familiar with. Luckily, Tom Hanks's crew at HBO will soon be producing a miniseries based on Vincent Bugliosi very massive and factual book Reclaiming History. Perhaps only then will the false perceptions of this tragic event be overturned. Part 2 of this clip may be found here.