No. M3U8 is a UTF-8 playlist format, and an address may describe a single adaptive stream rather than a library of television channels. An HLS media playlist can list short video segments; a multivariant playlist can list versions of one presentation.
Recognise the two jobs
A channel-list import organises many viewing choices. An HLS playback manifest tells the video engine how to fetch one presentation. Both use playlist syntax, which explains why an address that plays one channel in a browser may not populate a full player library.
Follow the intended import path
If the supplied link is for one stream, open it with the player’s network-stream function where supported. If you expected a subscription list, ask for the appropriate account or playlist details. Renaming an .m3u8 file to .m3u does not create missing channels.
Avoid editing live manifests casually
Segment addresses and timing information can change continuously. Saving and reopening an old live manifest may refer to segments that have already expired. Keep a live-stream address private if it includes access tokens, just as you would protect other account links.
