should a 1950s tv show be now in the public domain

i would like to post an episode to my youtube channel of a 1950s tv show, the adventures of robin hood, but i know if i upload it i'll get a copyright strike probably...but shouldn't that series be now in the public domain so you can post it without getting a copyright strike?

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uikakarotuevegeta · 26-30

I think it enters public domain around 80 years after the death of the copyright owner or the date the IP was copyrighted?