I think its intentional in debug builds for it to be applied to all DirectX surfaces, which would include video players using DXVA rendering. Even paying users have it (except for dhjohns) based on what I've read as well. It probably won't go away until the stable version is out. You could try setting your video player to use software rendering instead and not DXVA and I suspect it won't show the watermark unless a GDI object is overlayed over the video. Even the RDP client it shows, because RDP uses a Direct3D rectangle to render the remote session. So I am pretty sure its intended functionality in debug builds for it to inject the watermark onto all Direct3D and maybe Direct2D surfaces. Or enable subtitles in your video player and have it match the font of the watermark, then after awhile you will probably get use to it and just subconsciously feel that its part of the movie or TV show. Watermark when watching movies at SMPlayer missing only in settings to rendering instead DirectX it is OpenGl Sorry for Google translator