There is a bug in Skype where the image of the webcam is truncated and flipped upside down.
Perhaps it is possible to package an older version (Pre Microsoft...) of Skype for Tanglu 4? Maybe some other fix?
hmm...maybe v4lcompat can help. Please install libv4l-0 for your architecture. Probably it is already installed.
Then start skype from terminal with LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libv4l/v4l1compat.so /usr/bin/skype for 64bit or LD_PRELOAD=/usr/lib/i386-linux-gnu/libv4l/v4l1compat.so /usr/bin/skype for 32bit
Please check the path. Maybe its slightly different.
If it works but the picture is still flipped please place a LIBV4LCONTROL_FLAGS=2 for flipping horizontal or LIBV4LCONTROL_FLAGS=4 for flipping horizontal and vertical
Hope it helps