Video and VFX generally don't need to keep whole sequences in RAM persistently these days because:
1. The high-end SSDs in all Macs can keep up with that data rate (3GB/sec)
2. Real-time video work is virtually always performed on compressed (even losslessly compressed) streams, so the data rate to stream is less than that.
1. The high-end SSDs in all Macs can keep up with that data rate (3GB/sec) 2. Real-time video work is virtually always performed on compressed (even losslessly compressed) streams, so the data rate to stream is less than that.