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I have a book from C. Francis Jenkins. He had been working on radiovision since 1900 (and even offered a newspaper account to support the claim). He had the plans to build his device printed in the book (1929) as well as sample images. He wanted people to build receivers and then communicate to him (by mail) with their results at receiving his broadcasts.

Radiovision was his term for what we call "television". Television was his term for what we call "cable television".

Radiovision was a broadcast signal. Television was a cable signal. He could not lay out sufficient high grade wire to implement "television".

Radiomovies was his term for closed audience "broadcasts" (at say a theater). This was "pay per view" broadcasts of major sporting events (like boxing). As movies go digital, they will be beamed by satallite to theaters to reduce shipping costs that much more.

Jenkins studied the flapping of a flag on a flagpole and came up with a patent for movie projectors (pre-1900) that kept the film from flapping as it went past the lens. Thomas Edison bought that patent from Jenkins' company and used it to shut down a lot of other projector manufacturers.

There are a lot of inventors who get overlooked. I'll have to look at that website sometime. Looks interesting. I just hope that it doesn't spin the hyperbole of "first" too much.