As you know, you can create a bookmark by inserting w:bookmarkStart / w:bookmarkEnd elements at the appropriate place in the markup:
<w:p>
<w:bookmarkStart w:id="1"
w:name="TestBookmark"/>
<w:bookmarkEnd w:id="1"/>
<w:r>
<w:t>To make your document look professionally produced.</w:t>
</w:r>
</w:p>
You can create a link to this bookmark by inserting the following markup:
<w:p>
<w:hyperlink w:anchor="TestBookmark"
w:history="1">
<w:r w:rsidRPr="001B53E7">
<w:rPr>
<w:rStyle w:val="Hyperlink"/>
</w:rPr>
<w:t>TestBookmark</w:t>
</w:r>
</w:hyperlink>
<w:r>
<w:t>Video provides a powerful way.</w:t>
</w:r>
</w:p>
The w:hyperlink element should be a child of the paragraph, and a sibling to the runs.
-Eric