It was shown last month in a special screening at the 15th Thai Short Film & Video Festival, and now it's in limited release in Bangkok at House on RCA.
Here's the synopsis from the festival catalog:
Sua, the head of the group, is a congenitally handicapped man of 20. He is a director and has talked his three friends into the project. They are Charan, a blind fellow with the tiny body of a 10-year-old; Wut, a boy of 13 who lives in a silent world; and Tor, an autistic teenager. Through companionship and compensation for each other's corporal insufficiencies, the four companions make a short film that recounts their own story, to tell the world they are no different than other human beings.
In a genius move, the little sight-impaired guy is the sound man, holding the boom mike. And among the filmmakers who turn up to help is Tanwarin Sukkhapisit.
There's a trailer at YouTube, and it's embedded below.