A compressed XMLTV file can work only if the player or guide importer supports that compression format. The archive contains guide data, not channels or recordings. Check documented support before assuming that changing the filename will let an unsupported importer read it.
Identify the wrapper and the content
XMLTV describes programme metadata; gzip or xz compresses the text for transfer or storage. Both layers matter. A player that understands XMLTV may still reject a compression method it does not implement.
Use a documented source variant
If the guide provider offers both compressed and uncompressed addresses, choose the form supported by your player. Do not invent a new URL by deleting .gz unless that address is actually documented. For a local file, extraction should use a trusted tool and preserve private account information.
Compare import errors carefully
A failed download, a decompression error and a guide-mapping problem happen at different stages. Record which message appears and whether any channels receive listings. That helps support avoid treating a format issue as a missing subscription or incorrect clock. Keep the compression format in your support message instead of describing every guide file simply as XML.
