The format is not supported or the media is corrupt. | type = 9
This is very strange.... if all the parameters are the same they should play the same. Unless you're looking at the devid in server side authentication the side loaded channel should be equivalent to the private channel.
Are you sure they are the exact same params: stream urls, StreamFormat="hls", bitrates, qualities ??
The most frequent culprit of "The format is not supported or the media is corrupt" is that the StreamFormat setting does not match the content in the url.
There is new behavior in the 1533 firmware that causes that error if the box is set to stereo audio, but the stream only contains AC3. I don't know if AC3 is supported with HLS or not, but is it possible that's the issue here? AC3 audio with one box set to 5.1 and the other set to Stereo?
Have you experienced or heard of anything similar, where all streams would abruptly stop working for no discernible reason?