Fix CI tests.
Fix CI tests.

- The ffmpeg version got bumped. To make sure this doesn't happen again,
  let's just host it our selves.

lu-zero/kvazaar,ultravideo/kvazaar,lu-zero/kvazaar,ultravideo/kvazaar,lu-zero/kvazaar,lu-zero/kvazaar,ultravideo/kvazaar,ultravideo/kvazaar,ultravideo/kvazaar