The following is the priority that I will consider :-
1. Overseas experience in Singapore/Taiwan (Those with experience with Chinese Employer are preferrable as they easily catch up with the job and their Chinese cooking skill is more good.)
2. Age (preferrable over 30 years) (Those over 30 years are more mature and more responsible.)
3. How long has the maid worked for her previous employers ? (From this, you can judge that she is not too bad if she has worked for the same employer for more than 3 or more years.)
4. Fluency of English (They will not lead the children to learn/contact bad english.)
5. Appearance
6. her manner in the Video
7. Education (preferrable with secondary education) (as the maid with secondary education only is not eligible for applying jobs in Canada)