YouTube link – shows ! Error

Hello – Came with Twenty Fourteen Theme

If I leave YouTube ID blank – !Error
If I complete with ID – touchscreen ted – !Error
If I complete with ID – TouchScreen Ted – !Error
If I complete with ID – UCLLYf8Dwf_XST-Ib1fnTDvQ -!Error
If I complete with ID – channel/UCLLYf8Dwf_XST-Ib1fnTDvQ -!Error

Please advise.

https://wordpress.org/plugins/metro-style-social-widget/