Watched 7 recorded shows tonight using the DVR web UI Player without any issues.
That was after experiencing stalled playback or no/intermittent audio on them.
So I cleared the streaming cache and deleted the video indexes for the shows in the Metadata directory.
They all played back perfectly after that.
This is local playback. Not sure how remote playback would work.
This works reliably for my TVE and Custom M3U channel recordings (HLS and MPEGTS sources).
For recordings from my HDHR PRIME (which is an MPEGTS source), they always stall starting and I have to nudge them by skipping ahead. After that the play fine.