Hi I tried to used drone video under full motion video extension to create map and conduct some distance measurements but it didn't allow me to perform either one . Can any one explain workflow of using drone videos in Full motion video extension it will be great

Hi David, Full Motion Video has not been discontinued for ArcGIS Desktop. You may just need to fill out the request for a license on the download page or contact your customer service representative to get setup with a license. I have posted a photo displaying where the request form should appear.