Enable the player to play back the source code synchronised with its state in the video.

Ideas to approach this:

• Perform OCR on each frame and map discovered changes to the correct part of the file (courtesy of RoyH)
• Leverage git commit times - the commit automatically performed when saving - and possibly "start recording" time from OBS to link up the source and video (courtesy of Brian)
• Leverage edit-time information from the streamer's editor (e.g. vim's undo persistence) and possibly "start recording" time from OBS to link up the source and video

Thanks to Kknewkles for the idea