Hi Tomoko,
Welcome to the Box Community, I'm happy to help!
I understand you are having issue with closed caption not appearing on video preview in Box.
Could you please try these troubleshooting tips to make sure that every angle is checked?:
I also strongly recommend checking out this article about closed caption on box preview to learn more about the limitations and how to prepare your files for it: Enabling Closed Captions for Videos
Let us know how it goes and if you have any questions!
All the Best,
Hello France,
Thank you for replying to my question. I tried all of your suggestions, but the caption still does not appear.
I am using Adobe Premiere Pro and the only caption I can embed is 608 with Quicktime encoding. Because of our corporate security setting, I cannot use third-party tools for this task. Is there any other way I can get the caption to appear?