[{"key":1,"vid":[["adfsdfasfd","munit"],["ssgs","lj234"]],"otherkey":"stuff here"},{"key":2,"vid":[["funit","gunit"],["odhfw23","12khdfdf","ddf"]]}]

db.collection.update({"vid":{$elemMatch:{$elemMatch:{$in:["adfsdfasfd"]}}}},{"$push":{"vid.$":{$each:[1000,100,new Date()]}}})