[{videoSection:{title:"Social construction",videos:[{title:"a",isApproved:true},{title:"b",isApproved:false},{title:"c",isApproved:true},],isPublished:false}},{videoSection:{title:"Social construction1",videos:[{title:"a",isApproved:true},{title:"b",isApproved:true},{title:"c",isApproved:true},],isPublished:false}},{videoSection:{title:"Social construction",videos:[],isPublished:false}}]

db.collection.update({"videoSection.videos.isApproved":{$exists:true,$ne:false}},{$set:{"videoSection.isPublished":true}},{multi:true})