The premiere status and eligibility for specific categories can be found here:
FEATURES: What is the SXSW premiere & eligibility policy for feature films?
SHORTS: What is the SXSW premiere and eligibility policy for short films?
MUSIC VIDEOS: What is the SXSW premiere and eligibility policy for music videos?
EPISODICS: What is the SXSW premiere and eligibility for episodics?
XR EXHIBITION: What is the SXSW premiere and eligibility for virtual reality projects or 360 video?