This video shows application of sabi, black lacquer sabi.
For more on lacquer based kintsugi see https://www.kintugi.com/
The video shows step 5, application of sabi.
Step 5 refers to this page, https://www.kintugi.com/?page_id=80
For more on traditional, lacquer based kintsugi see kintugi.com
Knowledge base for real lacquer kintsugi.