Publish Captivate Project in 2017 with a TOC as an MP4???

I have created a 2017 Captivate project with a TOC. I have published it as an html, html5, and .pdf video where the TOC appears to the left side of the video and is functional. When I publish it as an mp4, the TOC vanishes. Has anyone published an mp4 with a TOC? If so, can you share the secret? Rick Legg