It's still the largest of all the video websites, with around 80 million U.S. visitors alone, and it has been pushing out great innovations like HD video and in-video captioning.

拥有8000万美国用户的YouTube仍是视频站点的巨无霸，它也一直在推出技术创新，如高清视频和嵌入式字幕。

youdao

Google video was first launched in 2005 as a search service for television content because TV close-captioning made search possible and user-generated video had yet to take off.

2005年首次推出Google Video，一开始只是用来搜索电视内容，电视字幕功能使得这种搜索是可能的，当时个人视频还没兴起。

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Matrox PC-VCR 2.0, the included software used for TV recording, includes the capability to search for specific video using keywords in closed-captioning, as well as create text transcripts of shows.

CNN: New graphics card mimics VCR