Extended is identical to main but allows FMO/ASO features to be used, and prevent using CABAC. Using similar logic to "baseline", assume that if we support main, we can also do extended. This fixes the following fluster vectors, which otherwise would fail when trying to link the parsebin pad. BA3_SVA_C MR6_BT_B MR7_BT_B MR8_BT_B Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/7854>