Youku subtitles need to be set on Youku Ido software, and the specific setting method is as follows:

1. Open a browser, enter "Youku Ido" in Baidu, and click "Baidu Click".

2. Click the "Download Now" button.

3. A dialog box will appear. Click "Download" button to download the software.

4. After downloading, double-click the "ido" picture on the computer desktop.

5. Open the "IDO" main interface, click the "Beautify" option, and then click the "Add Video" button.

6. At this time, a dialog box pops up, select the video to be subtitled, and click "Open".

7. At this point, the video is added to the list. Click the Subtitle option on the right, and then click the text style on the right. At this point, the text style appears below the video.

8. Enter the text you want in the text position. After adding the words, click the "Finish" button.

9. Finally, click the "Save Video" button in the lower right corner.