I'm a bit of a newbie with a lot of these features but was able to get a custom channel functioning in a m3u through both Text and File options. But I'm still running into issues with the channel url getting updated and breaking the link. So I have to manually update it each time.
I understand Channels does have the feature to auto refresh m3u urls but you have to use url as the source rather that text or file:
Is there any easyish way to get this working? I've been looking through a ton of posts but haven't found how to do this.