Google has announced the imminent abolition of one of the functions of the video service YouTube direct download video from web cameras. This was reported on the help page of the video service.
The function will be unavailable after January 16, 2016. As explained by the developers, this step is being taken because the opportunity was rarely used and is based on technology that is no longer supported.
Alternatively, it is proposed to use software on your computer for recording and saving video from the web camera, like Photo Booth for Mac OS X and for Windows Camera, and then upload your saved video to YouTube.