fix video encode test, waffle in fixture already
fix video encode test, waffle in fixture already

diox/zamboni,ingenioustechie/zamboni,ddurst/zamboni,ingenioustechie/zamboni,jasonthomas/zamboni,mozilla/zamboni,ddurst/zamboni,ddurst/zamboni,diox/zamboni,ingenioustechie/zamboni,jasonthomas/zamboni,washort/zamboni,jasonthomas/zamboni,mozilla/zamboni,washort/zamboni,ingenioustechie/zamboni,mozilla/zamboni,washort/zamboni,diox/zamboni,washort/zamboni,jasonthomas/zamboni,diox/zamboni,ddurst/zamboni,mozilla/zamboni