B->set_position (film, dcpomatic::DCPTime());
A->video->set_use (false);
B->set_position (film, dcpomatic::DCPTime());
A->video->set_use (false);
make_and_verify_dcp (film);
check_dcp ("test/data/no_use_video_test1", film);
make_and_verify_dcp (film);
check_dcp ("test/data/no_use_video_test1", film);
B->set_position (film, dcpomatic::DCPTime());
A->video->set_use (false);
B->set_position (film, dcpomatic::DCPTime());
A->video->set_use (false);
make_and_verify_dcp (film);
check_dcp (TestPaths::private_data() / "no_use_video_test2", film);
make_and_verify_dcp (film);
check_dcp (TestPaths::private_data() / "no_use_video_test2", film);