2006年，可汗自己制作视频，来帮助他九年级的表弟学习数学。
In 2006, Khan made homemade videos to help his ninth-grade cousin with math.
随着DV产品的不断普及，构建经济、实用的家用级全数字视频制作系统是许多人关心的问题。
With the popularity of DV products, many people are very concerned with the all-digital video making system for home using which is of great practical and economical value.
其中一项是“品牌频道”，让公司级用户能够为他们的推销视频制作专门页面。
One idea is for "brand channels" in which corporate customers create pages for their own promotional clips.
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