I and a friend were trying to watch the same movie together, I on Google Play Movies and he on Hotstar. We went with the “3…2…1…Start” method of movie synchronisation. Lag in Google Talk/FB Messenger (we tried both) made ~2 seconds the lowest gap we could reach.
However, we continued to drift in and out of sync (around 30s at max) throughout the movie, even when neither of us paused! I found that very suprising. I have several questions:
- Is this expected? Are movies on different platforms slightly different in content and speed?
- If not, how could this have happened? Do video players drift out of sync? Why?
- Do web extensions such as twoseven.xyz or Streaming Party account for whatever causes this issue? There are many services like this today and but my gut feeling is that they all use the current movie elapsed time to synchronise, which would not work if the videos themselves were slightly different.