How do I add text/subtitles to a youtube video?

Hi, add text/subtitles to a youtube video, that's easy, you need to download the youtube video onto computer hard drive first, then use a right software to add subtitles onto the downloaded video and re-upload onto youtube, I usually goto keepvid.com to free download youtube video, then use Youtube Movie Maker to add texts/subtitles on the downloaded video, then upload the new video onto youtube, easy to run youtube movie maker, add your downloaded video into the program, then drag and drop the video onto the video line, write texts(or press Add subtitle button) to add the subtitles onto the subtitle line(you can set texts effect, color, size and so on), then press "publish to youtube" button, you will get a new video on youtube, like what you said, you can download youtube movie maker from makeyoutubevideo.com, and view below channel for some online guides, youtube.com/easymakevideo, hope it can help you.