Add chapters to mp4 video file

This is xml syntax I discovered by using MKVExtract2:

<?xml version="1.0"?>
<!-- <!DOCTYPE Chapters SYSTEM "matroskachapters.dtd"> -->
<Chapters>
  <EditionEntry>
    <ChapterAtom>
      <ChapterUID>1</ChapterUID>
      <ChapterTimeStart>00:00:11.000000000</ChapterTimeStart>
      <ChapterDisplay>
        <ChapterString>Beggining of dance</ChapterString>
      </ChapterDisplay>
    </ChapterAtom>
    <ChapterAtom>
      <ChapterUID>2</ChapterUID>
      <ChapterTimeStart>00:00:25.000000000</ChapterTimeStart>
      <ChapterDisplay>
        <ChapterString>Put hands in the air</ChapterString>
      </ChapterDisplay>
    </ChapterAtom>
    <ChapterAtom>
      <ChapterUID>3</ChapterUID>
      <ChapterTimeStart>00:00:38.000000000</ChapterTimeStart>
      <ChapterDisplay>
        <ChapterString>Special movement with partner</ChapterString>
      </ChapterDisplay>
    </ChapterAtom>
  </EditionEntry>
</Chapters>

Now I use MKVToolNix to add xml file: