Fix CPU load calculation for multi-core systems

- Use percpu=False to get average across all CPUs
- Prevents false warnings when single thread is at 100%
- Correctly reports 8.3% load instead of 100% on 12-core system

videogen.py

@@ -3225,8 +3225,8 @@ class TimingTracker:
         load_factor = 1.0
         
         try:
-            # CPU load
-            cpu_percent = psutil.cpu_percent(interval=0.5)
+            # CPU load - get average across all CPUs (not per-CPU)
+            cpu_percent = psutil.cpu_percent(interval=0.5, percpu=False)
             if cpu_percent > 80:
                 load_factor += 0.5  # 50% slower if CPU is heavily loaded
             elif cpu_percent > 50: