After some waiting, he is chosen to help cast and audition the people who want to act. It's his foot in the door.
"I didn't know anything about auditions. But for two days I watched and I caught up," he says.
"On the third day I was given a chance to audition people. The director, Nathan, started trusting me and giving me things to do. I became happy."
Onuoch is casting boys for the role of Peter, one of the leads, when he discovers Teddy.
Most boys mumble, camera-shy. Teddy quickly grasps the need to speak naturally. But he keeps forgetting his lines.
There's another boy, who has the script down word-perfect. He's the natural choice.
Teddy sees it. He knows he is losing his chance, like a castaway watching a magnificent sailing ship disappear.
Late that night, Teddy is still awake. He has a copy of the script and reads it over and over, his face set in concentration.
"We didn't think Teddy would get that role," Onuoch says. "He was slow. And the other boy was fast. But then one week before filming started, Teddy just changed. He became Peter."
"I changed because I was afraid the other kid would get the part of Peter," Teddy says. "I was so afraid that if he got the part of Peter, he would play many roles. One day I borrowed the script and I went home and read it. And when I came back the next day, I'd put many words in my brain."
Finally, after weeks of work and about 1,000 auditions, the casting people aren't needed anymore. Onuoch is out of a job.
"After the auditions, people like me were told to go home," he says. "I refused to go home. I said, 'I'll just be sitting there. I'll just sit and watch.' "
He comes to watch the crew of "Togetherness Supreme" every day.
One day when Onuoch is in his usual position, watching Collett and the cast rehearsing, the cameraman isn't around.
"Nathan said, 'I want you to take that camera and shoot.' It was like giving someone a [camera] and they have no idea what it was," Onuoch says.
"I wasn't even in the crew. I was chosen. But Nathan just gave me that freedom. That's what gave me the courage."
At the daily meeting of the Hot Sun Foundation trainees, Teddy sticks close to Onuoch. Often the young man rests his hand softly on the boy's shoulder, touches his face lightly, puts an arm around him.
They're like brothers.
He's making a short film about Teddy for his film school project. He asks the boy about "Togetherness Supreme."
"Being in the film changed me, because before, I wasn't going to school," he says. "And now I'm going to school, because I paid my school fees with the money I got for going in the movie.
"I know my talent. Now big people will see me all over. And people in the street will know me."