Hi Mike. Thanks for the reply! The video will not be republished. The original youtube video would simply be embedded (anyone can embed youtube videos in facebook/twitter, etc..), while subtitle is synchronized along with it. As for the copyright, i think you're making a fair point. But I think the rules are outdated and geared towards the 80s era wherein people hardcode captions/subtitles into a new medium (VHS,cd) and then redistribute them afterwards - thus making the original owners suffer sales. With youtube embeds coupled with subtitles, not only are you helping people understand the video, you're also helping the original owners reach a wider audience. But i guess you're right that this issue should be kept in mind, and that if owners decided they don't want us to help them , then we'll stop subtitling or remove the content (but i think this should be rare, i cant imagine anyone not wanting their videos to made more widely shared).