It would be nice if players (my main concern is Xbox One) would display a “transcoding” message when they are bottlenecked waiting on the server to transcode instead of a generic “buffering” message.
While the client is technically buffering while its waiting for the server to transcode, I think most people associate “buffering” with network slowness. Also, since the mitigation is very different if the server is compute-bound communicating this explicitly to the user would make it much easier for them to troubleshoot why their video isn’t playing.