Zend certified PHP/Magento developer

300GB of MP4 files

I have 300GB of mp4 files and Im looking for guidance/tips how to reduce the size / compress besides Ffmpeg or Handbrake which takes forever

The files are in this format:

Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080

Im currently using Tdarr with the default settings, so encoding to H265