Have the following questions related to HLS support in Roku devices.
1. Are EXT-X-DISCONTINUITY tags supported for HLS? Are there some events fired when discontinuities happen? 2. Timed metadata, can it be less than a second? 3. Is there a way to switch the audio stream programmatically mid-stream? 4. Please share the exact HLS protocol version currently supported by all current devices(provide a matrix, if different models support different HLS versions)