Superb.

Sound issues can be resolved easily.
1 - Refresh the page & let it sit for 5 minutes, this enables the file to load properly.
2 - Make sure your Internet speed is over 30mbs when watching videos on Archive.Org as anything below you will have issues.
3 - Try opening the video in a separate page and again leave the page to sit for 5 minutes before clicking play.
4 - You can also download the video from Archive.org and then watch it using 'VLC media player' for example.

The Video works fine for me if the steps above are used.
Thanks.

Nearly impossible to pause and continue, absolutely impossible to try to go back or ahead and get it to play again.

The sound seems to be out of sync - in several dimensions.