HEVC feed is not working in Stream Tester Tool.
Direct Publisher supports the four major video formats:
- HTTP Live Streaming
- Smooth Streaming
- MPEG Dash
- MP4, MOV or M4V
HLS feed may also not work because MAP segment is too large. If the MAP segment can be changed to be no larger than 4MB, you should be able to start playback successfully in the Stream Tester Tool.