Where is this alleged film? Where can I see it?
Magicians Penn &Teller put on their shows with excellent lighting and quite often with excellent video or photographic recordings of their accomplishments.
Penn & Teller will tell you that they are illusionists, and although the things seen may appear to defy the laws of nature, they do not. What the things seen DO defy is the ability of the human mind to determine correctly what is going on.
I notice from doing a web search for additional information on Phillip that the film has gone missing.
What an unfortunate blow to man's search for the reality behind reality. One would think that such a film would have been treasured, perhaps safely ensconced in the national archives. but it isn't.
Maybe it's in heaven.
A sailboat moves across a lake powered by invisible forces. Does this "prove" the existence of a spirit realm populated with gods and monsters? Hardly; in the case of the sailboat, the "invisible force" acting on it is the wind, a completely natural (not supernatural) physical (not metaphysical) phenomenon.
Are you familiar with the "fairy" hoax that was perpetrated in 1917 by a couple of schoolgirls from the village of Cottingley in the UK on people who wanted to believe, including Sir Arthur Conan Doyle, whose investigative skills apparently were not equal to those of his creation, Sherlock Holmes. It was photographed too.
For more on this, see here: http://www.chriswillis.freeserve.co.uk/cottfair.htm