contentDetails or duration not coming using Youtube v3 api

Question

Look at this link , there is an example given

https://www.googleapis.com/youtube/v3/videos?id=7lCDEYXw3mM&key=YOUR_API_KEY
 &part=snippet,contentDeta         


        

Answer 1

Step 1: You have a list video id by using Search: list
For example you receive 3 youtube video id like:
{ zOYW7FO9rzA, zOYW7FO9rzA, -vH2eZAM30s}
Step 2: You have to put the list of youtube video id for the second call.

https://www.googleapis.com/youtube/v3/videos?part=contentDetails&id=zOYW7FO9rzA,zOYW7FO9rzA,-vH2eZAM30s&key={Your API KEY} 

Therefore, you won't have to make a call for each video
The result will be:

{
 "kind": "youtube#videoListResponse",
 "etag": "\"iDqJ1j7zKs4x3o3ZsFlBOwgWAHU/p3KyUGr7ZRowLgKTqVFixrx7-mQ\"",
 "pageInfo": {
  "totalResults": 3,
  "resultsPerPage": 3
 },
 "items": [
  {
   "kind": "youtube#video",
   "etag": "\"iDqJ1j7zKs4x3o3ZsFlBOwgWAHU/psAhg0bxv1n1IfKwXhrPMV223YE\"",
   "id": "zOYW7FO9rzA",
   "contentDetails": {
    "duration": "PT1M21S",
    "dimension": "2d",
    "definition": "hd",
    "caption": "false",
    "licensedContent": false
   }
  },
  {
   "kind": "youtube#video",
   "etag": "\"iDqJ1j7zKs4x3o3ZsFlBOwgWAHU/YCi772AbPZizPuAFci702rE55tU\"",
   "id": "T3Ysb9O3EWI",
   "contentDetails": {
    "duration": "PT1H28M47S",
    "dimension": "2d",
    "definition": "hd",
    "caption": "false",
    "licensedContent": false
   }
  },
  {
   "kind": "youtube#video",
   "etag": "\"iDqJ1j7zKs4x3o3ZsFlBOwgWAHU/2BnWErqkysQERsaRNyd1ffGgJes\"",
   "id": "-vH2eZAM30s",
   "contentDetails": {
    "duration": "PT12M57S",
    "dimension": "2d",
    "definition": "hd",
    "caption": "false",
    "licensedContent": false
   }
  }
 ]
}

The format duration: 1H1M1S = 1 hour & 1 minute & 1 second