[{"_id":1,v_name:"Hair Patch in Delhi",v_url:"https://www.testurlvideo.com",v_comments:[{"user":"Kush Khurana","comment":"Awesome Video"},{"user":"Nikhil","comment":"Keep up the good videos"},{"user":"Kush Khurana","comment":"Very good and Awesome Video"},]}]

db.collection.find({"_id":1,"v_comments.user":"Nikhil"},{"_id":0,"v_comments.$":1})