Change Playlist debug description to be the hls output

[jaybpierce]

Description

This PR implements feature #13 .

Change Notes

• Changes Playlist debug description to be the hls output.
• Falls back to original output when write fails

Pre-submission Checklist

• [x] I ran the unit tests locally before checking in.
• [x] I made sure there were no compiler warnings before checking in.
• [ ] I have written useful documentation for all public code.
• [ ] I have written unit tests for this new feature.

[CLAassistant]

All committers have signed the CLA.