This movie is in the public domain, and you can find a copy on Archive.org (https://archive.org/details/PHANTOMFROMSPACEVideoQualityUpgrade) but Legend have released a very nice cleaned-up colorized print (you can see the trailer here: https://youtu.be/Fngo-VccDZo), so there's absolutely no reason not to riff that version if you can get it.

This movie is the work of W. Lee Wilder, who also brought us the Peter Graves classic 'Killers From Space' and involves an "invisible" alien who crashes his spaceship on Earth and then spends most of the movie wandering around naked in Griffith Observatory floating items around on strings. The alien can't breath our atmosphere (I hear you, buddy) so even though he's invisible, he wheezes like Darth Vader when he's not wearing his space suit, which looks like someone put the Robot Monster costume on backwards.
You'll thrill at the most nondescript and interchangeable cast since 'Radar Secret Service,' and almost feel sorry for the poor asthmatic alien who mainly just wants to get the hell out of L.A. and find some pants.