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__sa__nya,
А Camstudio??

CamStudio is able to record all screen and audio activity on your computer and create industry-standard AVI video files

For more advanced screencasts, we recommend OBS (Open Broadcaster Software). It’s very powerful, free, open-source tool that allows you to do more. Insert watermarks, embed a video of your webcam while capturing your desktop, choose specific desktop windows, and so on. OBS is widely used for video-game-streaming on Twitch.tv because it’s so powerful, but it works just as well for creating a professional-looking video of your desktop.

How to Record Your Desktop and Create a Screencast on Windows

т.е. например нужно записать видеоролик, проигрываемый в окне веб-обозревателя вместе со звуком »

То есть вам надо программа для захвата stream video??