The Domain Name System resolves names to records used by applications, including addresses for hosts. It helps a player locate a named service but does not carry the programme video itself. A DNS problem can stop a hostname resolving, while successful resolution still leaves routing, secure connection and account authorization as separate stages of access.
A practical example
A player can fail to reach a server named in its playlist if name resolution fails. Using a correctly functioning resolver may fix that lookup, but it cannot repair an expired account or a media resource that the server no longer supplies.
A common misunderstanding
Changing DNS is not a universal buffering fix and does not increase a stream's rights or permissions. Diagnose whether resolution is actually failing before altering a working network configuration.
Related terms
Further reading
Stable technical definition. Editorial approach