Yes, KINETOSCOPE is a Scrabble word!

Letter values in Scrabble US: K 5, I 1, N 1, E 1, T 1, O 1, S 1, C 3, O 1, P 3, E 1.

Is it a valid word?

KINETOSCOPE is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

a device invented by Edison that gave an impression of movement as an endless loop of film moved continuously over a light source with a rapid shutter; precursor of the modern motion picture