笔者认为，成功的原因包括1，家庭宽带；2,flash的出现，所以不需要编解码器(codec)；3，数码相机的大量使用；4，廉价的托管服务；5，一键上传功能；6，嵌入式分享功能。

I think they included (1 - broadband in the home 2 - emergence of flash, so no codecs required 3 - proliferation of digital cameras 4 - cheap hosting 5 - one click upload 6 - ability to share embed).

youdao

笔者认为，成功的原因包括1，家庭宽带；2,flash的出现，所以不需要编解码器(codec)；3，数码相机的大量使用；4，廉价的托管服务；5，一键上传功能；6，嵌入式分享功能。

I think they included (1 - broadband in the home 2 - emergence of flash, so no codecs required 3 - proliferation of digital cameras 4 - cheap hosting 5 - one click upload 6 - ability to share embed).

youdao