How is “work on” used?

In Bo Burnham: Inside (2021), one line is: “So, yeah, I'm gonna work on this forever,”

Which movie is “work on” from?

The clip at the top of this page is from Bo Burnham: Inside (2021).

to try hard to improve or achieve sth; to have the desired effect on someone or something; to succeed in influencing or affecting them

Heard in 115 moviesPlay Phrasal verbs

Oxford70% of films
to try hard to improve or achieve sth
Editorial25% of films
to have the desired effect on someone or something; to succeed in influencing or affecting them

Definitions from the Oxford Advanced Learner's Dictionary, 9th edition

So, yeah, I'm gonna work on this forever,

Said in 8 films · #1