One documentary that demonstrates finding flow (happiness) in work is Jiro Dreams of Sushi (2011), which is the story of Japanese master chef Jiro Ono, who is a Shokunin, an expert craftsman who strives for perfection and feels great fulfillment and joy from yearning to improve bit by bit. He explains it thusly,
"You must dedicate your life to mastering your skill. That’s the secret of success and is the key to being regarded honorably. […] . Even at my age, after decades of work, I don’t think I have achieved perfection. But I feel ecstatic all day. I love making sushi. That’s the spirit of the Shokunin."
From:
https://moviewise.substack.com/p/going-through-an-existentia...