classic TV - Tales of Tomorrow - "Time To Go" (1952)

An alien race is dying, but Earth can save them - by depositing saved time in their bank. Natalie loves that she can get her time back with interest, adding years to her life, while the aliens manipulate the stored hours to save their advanced civilization. She hates to waste a minute anyway, but her husband enjoys his time so much, he's not eligible to be a depositor.
https://www.imdb.com/title/tt0717087/plotsummary?ref_=tt_ov_pl

This video is in the Public Domain.