I think three points make this video very good: 1. At the beginning of the video there's always a review of the last lesson. 2. They make the video interactive and live. The examples in the video are also good.
yì bǎi : hundred 100
e.g: liù shí : sixty : 60
This video (see at YouTube) is of beginner level difficulty. It has subtitles in English, Pinyin and Chinese characters.