So VideoScribe does use Unicode for the current alphabets that it supports, but we haven't yet added Amharic to the list of supported languages (although it isn't just a matter of adding it to a list for it to be supported). I've added this to our developer's list of alphabets to be supported in the future.
In the meantime see the article Write with non-Western text characters for a list of supported alphabets and what to do if the alphabet you would like to use is not currently supported.
Fitihalew Birara