1. Download the file with the button above

  2. Rename the downloaded file to tb.bat

  3. Start a youtube video

  4. Open a command window in the downloaded directory and start with:
    cmd> tb

  5. Unplug the laptop and wait. If the laptop goes to sleep (maybe youtube auto-pause) just wake and start the video playing again

  6. If battery dies check the number of minutes with:
    cmd> type tb.txt | find /c /v ""

  7. If running is >100 and estimated is >120, record the estimated and stop the script with CTRL-C