If I go into one of my videos and add captions, annotations, etc.. does this cause a new copy of the video to be created with them on it? or Does it just save them onto the current video?
Yeah, on YouTube, forgot to mention that. Editing info, description, title, etc.. is fine, but what about adding annotations, captions, sound clips, etc.. ?
When you edit a video on YouTube, you are still editing the original video. You create a new video by uploading a new video to Youtube.