[ #49034 ] Move the video classes to their own folder

src/CMakeLists.txt

src/account.cpp

src/account.h

src/call.cpp

src/video/videochannelmodel.cpp

src/video/videochannelmodel.h

src/video/videocodec.cpp

src/video/videocodec.h

src/video/videocodecmodel.cpp

src/video/videocodecmodel.h

src/video/videodevice.cpp

src/video/videodevice.h

src/video/videodevicemodel.cpp

src/video/videodevicemodel.h

src/video/videomodel.cpp

src/video/videomodel.h

src/video/videoratemodel.cpp

src/video/videoratemodel.h

src/video/videorenderer.cpp

src/video/videorenderer.h