Yes, STUDIOS is a Scrabble word!

Letter values in Scrabble US: S 1, T 1, U 1, D 2, I 1, O 1, S 1.

Is it a valid word?

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

workplace for the teaching or practice of an art
an apartment with a living space and a bathroom and a small kitchen
workplace consisting of a room or building where movies or television shows or radio programs are produced and recorded

Also: studio apartment.