What does Signed URL mean?
A signed URL includes information the service uses to authorise a particular request, often with an expiry. It can grant temporary media access without being a permanent catalogue address. The exact scheme and validation rules belong to the service.
Why it matters
Treat the complete link as sensitive while it is usable. Copying it to a public tester can expose access, and editing a signature or expiry normally invalidates it rather than extending permission. If an old saved link fails, reopen the item through the supported player to obtain current authorised access. A valid subscription and an expired individual URL can coexist.
A practical example
A media request copied during yesterday's session may stop working today while the normal account login still succeeds. That is different from evidence that the whole subscription expired or needs repurchasing.
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Related terminology: Signed programme edition, Simulcast.
For practical setup and troubleshooting, browse the journal or support guides.