There is a Windows PC which is running an application that displays video from a camera. The video updates at between 10 and 25 Hz. When I'm at that PC, the application is very responsive. If I remote-desktop to that same PC, then the application becomes extremely sluggish; scrolling over the app's menu-bar reveals that the app is not responding to mouse-events (while scrolling over the menu-bar of, say, Windows Explorer behaves normally). However, if (within the RD session) I reposition the remote application's window such that the embedded-video is off-screen, then the application starts responding to mouse-events normally. Similarly, dragging another window (on remote PC) over the video-window also causes the app to run freely.
This behavior makes it impossible to use the video-application on the remote desktop.
Any help is appreciated.