add HEVC 4K LIVE DASH DRM test case

[jpiesing]

4K + HEVC + live + DRM may raise unique issues not raised by our existing streams. We should consider whether it would be helpful to add such a stream to the reference app. It should be noted that live streams are expected to have significantly higher bandwidth than on-demand, potentially 30-35 MBit/sec. A VOD stream to be used with livesim for such a test should be encoded at the higher bitrate.

[jpiesing]

In the work on the DRM guidelines, it has been reported that terminal performance is a DRM interop issue. See https://redmine.hbbtv.org/issues/12951#note-2

[Murmur]

Added preliminary test item with a high video bitrate, static manifest at the moment. Manifest has just 2160p video resolution, audio is a normal AAC-128Kbit-stereo.

Smaller HbbTV(1080p only panel) devices may not able to downscale this track so only audio track may be played.

Playready2: 2.19 HEVC 2160p high bitrate
Playready CENC, h265(2160p hvc1 [email protected] 32Mbit)

Widevine: WV.7 HEVC 2160p high bitrate
Widevine CENC, h265(2160p hvc1 [email protected] 32Mbit)

https://refapp.hbbtv.org/staging/catalogue/index_mse-eme.php

[Murmur]

Dashjs+Windows+EdgeBrowser+HEVC high bitrate multiperiod gives an error, see this ticket.
Dash-Industry-Forum/dash.js#4304

[Murmur]

Dashjs fixed a HEVC MSEdge brower's playback issue on the latest V5 release.
We need to upgrade from V4 to V5, but it requires few dashjs API function changes in the application code.