Do we know how long returned links stay valid?

[port19x]

Title.

[Derisis13]

I'd say pretty long, I had one yesterday sitting for a few hours and it played until the very end, even though it wasn't cached completely

[CoolnsX]

depends on how providers handle links on their end. some does 8 hours, some whole day and some like 2 hours. It's also depends on CDN cache, like if something is used frequently its link will be longer valid