十二岁时，他开始用爸爸的电影摄影机自制短片。
At twelve, he started making his own short films with his dad's movie camera.
这些个人上传的内容（当然不光是宠物视频，还有自制音乐短片、婚礼视频等）是YouTube推行的三大战略之一。
Such personal offerings (not just cats, of course, but homemade music videos, wedding videos, etc.) represent one of three strategies that YouTube is pursuing.
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