These are the Music Video eligibility requirements for SXSW:
Eligible: To be eligible for SXSW 2020 your project must have been completed in 2018, 2019 or be on track for completion in early 2020.
SXSW does not place any restrictions on the premiere status of music videos. The vast majority of music videos screened at SXSW will have premiered online prior to the festival.
It’s important to note that only OFFICIAL ARTIST APPROVED Music Videos are eligible for SXSW.
What we mean by "OFFICIAL ARTIST APPROVED" is that the music video should be the official music video for that song by that artist. As in, the artist and/or label commissioned the video and has their approval to be made.
To submit your music video to SXSW, click here.