Took a look, played some Tina Turner, thought about it a bit.
Art Text is a bit of 3rd-party shareware that can produce some psychedelic text ... if that's what you need. Maybe not.
300x300 (pixel) graphics are the standard for Chapter Art ... which also seems to not be what you are concerned about.

I fear reposting your episodes without the movies and extra graphics is the only way to extend your storage. Which is a shame.
Dave M