Server Version#:4.62.1
Player Version#:1.35.1.2632-c6783c78
Simply put, I want plex media player to start buffering when I play the video, and keep buffering the entire video until 100%. Is this something I can alter in a config file or something?
Currently, it seems like it buffers about 3 minutes of content.
You cannot change that default behavior.
If you want to watch a movie “on the road” you can use Plex’ download feature which is e.g. available for the Plex for Windows desktop client (not PMP or Plex HTPC though).