Never use MP4 or H.264 directly in Arena 6.0.1. It will cause crashes. Use the free tool to convert all clips to .mov with DXV 3 (Normal quality). This ensures smooth scrubbing and layer mixing.
Resolume Arena 6.0.1 remains a testament to a specific era of VJing—an era just before GPU real-time raytracing and AI-generated content, but an era where manual mapping and beat-matched precision reigned supreme. It is a classic, and classics never truly die.