Add link to video explaining the projects / solution
Add link to video explaining the projects / solution

ClareMSYanGit/Open-XML-SDK,OfficeDev/Open-XML-SDK,EricWhiteDev/Open-XML-SDK,tarunchopra/Open-XML-SDK,tomjebo/Open-XML-SDK,ThomasBarnekow/Open-XML-SDK,EricWhiteDev/Open-XML-SDK