Beyond iTunes: Subtle Festival-Only Licensing Mistakes?

Hey everyone, Isabella here. I'm deep into post-production on a short drama shot on an AMIRA, and I’m hitting the wall with licensing. My current workflow involves a lot of meticulously logging every asset we use, especially for music and archival footage. I've been super careful about the obvious 'assumed rights' trap, like not just using a song because I bought it on iTunes. That's a no-brainer.

But I'm wondering, for indie filmmakers gunning for festivals, what's a subtle, maybe less obvious, licensing mistake people often make, specifically when dealing with initial 'festival-only' rights? Are there common blind spots beyond just basic copyright infringement that could bite us later? I want to make sure I’m not missing anything critical before we start submitting.