By version 12.1, The Foundry significantly improved the Viewer Cache and GPU-accelerated nodes (blur, matrix, keyers). On a decent x64 system with a modern NVIDIA GPU, artists could see near-real-time playback of complex scripts.
Absolutely not. Use a legitimate license. The cost of a data breach from malware in a cracked build is exponentially higher than the software license. The Foundry Nuke Studio 12.1v1 x64 -FileCR-
This feature allows multiple artists or supervisors to review the same timeline remotely. Each participant can draw on the screen, play, and scrub while everyone else sees it instantly—critical for modern remote workflows. By version 12
Powerful software, but 12.1v1 is now legacy (EOL - End of Life). If you are starting fresh, look at Nuke 14.0 or 15.0 via a free trial. If you need 12.1 specifically, get it through an official Foundry support account, not FileCR. Use a legitimate license