It's best to click the flag, stop it, and then restart it.
This ensures that everything is cached to prevent lag and desync.
It will loop, but this can cause Desync.
May take a while to load.
I broke the MP4 into each frame, inserted all of them, and have it looping.
I imported the MP3 for the video too.
(From YouTube Upload by Deviant Otaku)
(Original by LamazeP on NicoNico)