Using paid for VideoPad version 8.40 on iMac 27", Late 2015, Retina Display, i7, 32GB RAM, AMD Radeon R9 M395X 4096 MB video card, MacOS X 10.11.6.
If the VideoPad window is made larger than about half the area of the screen the VideoPad application memory (as shown by the Activity Monitor) slowly but continuously builds up until the Force Quit Applications warning message displays with "Your system has run out of application memory." (Activity Monitor showing VideoPad (Not Responding) with 88+GB memory used. If the window is kept slightly smaller or if "Open in low resolution" box ticked