The suffix changes the naming model
RFC 6762 gives .local names special link-local multicast-DNS semantics. A name used for an owned local media device is therefore different from a public service domain that conventional DNS resolves globally. Expecting a public resolver change to make every local device name work can send troubleshooting in the wrong direction.
First copy the documented hostname accurately and identify the device it should name. Do not translate the suffix or invent a public domain from the device's brand. Keep localhost separate too: localhost refers to the requesting device's loopback environment, while a .local name can identify another device on the relevant local link. Similar-looking words do not imply the same endpoint.
A hypothetical laptop and guest network
Suppose an authorised local server is reachable by its documented .local name from a home laptop, but a phone on a guest network cannot find it. The useful comparison includes the network segment and local discovery rules. A working internet page on the phone does not establish that the phone can discover the local server across that boundary.
Ask the network owner about the supported arrangement. Do not disable guest isolation or install an unknown discovery relay merely to make the name appear. On a network you control, compare the documented same-link setup and preserve the result. The goal is to establish the intended local path, not bypass a managed network policy.
Use the application's supported discovery route
Some products provide their own discovery screen, stable local address guidance or an approved hostname. Follow that documentation. A successful name lookup is still only one stage: the server must accept the connection and the media application must support the selected resource. Do not treat discovery success as proof of content entitlement or decoding support.
A name conflict can also matter in local naming. Preserve the actual discovered name rather than assuming it can never change or that a similarly named device is the intended server. Verify identity through the product's own interface. Do not send private credentials to the first device whose display name resembles the one you expected.
Report the naming context clearly
A useful report identifies the server device, client device, documented .local name, network context and exact lookup or connection result. Omit access tokens and private paths from public posts. Say whether the name fails to resolve or whether a connection fails afterward; those are different stages.
After a supported network or product change, repeat discovery and the actual authorised playback task. The final conclusion should name the tested local arrangement. A .local address working at home does not establish that it will work at a hotel, over mobile data or through every remote-access product. Its scope is part of the design, not an arbitrary player defect.
Questions answered
Will a public DNS change necessarily fix a .local device name?
No. .local has link-local multicast-DNS semantics. Check the documented local discovery and network arrangement.
Is .local the same as localhost?
No. Localhost refers to the requesting device's loopback environment; a .local name can refer to another device in its relevant local context.
Sources & further reading
Official references for the subjects discussed. Service terms and device software can change.