@freeschool I dont think there was ever a length of time restriction, but there is certainly a audio size limit. I cant imagine we ever allowed 1/10th of a gig media on this server. All media is retained so across tens of thousands of users that would be an insane amount.
For large-format stuff we have other services better suited for that.
However if you find there is a change in maximum file size from the old server I can look but all the configs were ported over so I doubt that changed in any way. My guess is you are just trying to upkload higher quality and thus bigger size.
I can create a federated pod cast instance though.