Magento 2 API add Video to product.

gistfile1.txt

<?php

$adminUrl='http://magento2.dev/rest/V1/integration/admin/token';
$ch = curl_init();
$data = array("username" => "admin", "password" => "admin123");                                                                    
$data_string = json_encode($data);                       
$ch = curl_init($adminUrl); 
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");                                                                     
curl_setopt($ch, CURLOPT_POSTFIELDS, $data_string);                                                                  
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);                                                                      
curl_setopt($ch, CURLOPT_HTTPHEADER, array(                                                                          
    'Content-Type: application/json',                                                                                
    'Content-Length: ' . strlen($data_string))                                                                       
);       
$token = curl_exec($ch);
$token =  json_decode($token);        

// @Todo : foreach youtube video
// get sku + Video ID
//

$videoId = 'axwE9q7llEQ';
$sku = '123-456'

$data = [   'entry' => [
      'id' => null,
      'media_type' => 'external-video',
      'label' => null,
      'position' => 0,
      'types' => ['image', 'small-image', 'thumbnail'],
      'disabled' => false,
      'content' => [
          'base64_encoded_data' => base64_encode(file_get_contents('http://img.youtube.com/vi/'.$videoId.'/0.jpg')),
          'type' => 'image/jpeg',
          'name' => '0.jpg'
      ],
      'extension_attributes' => [
          'video_content' => [
              'media_type' => 'external-video',
              'video_provider' => 'youtube',
              'video_url' => 'https://www.youtube.com/watch?v='.$videoId,
              'video_title' => 'Video',
              'video_description' => null,
              'video_metadata' => null
          ]
      ]   ] ];



//Use above token into header
$headers = array('Content-Type:application/json','Authorization:Bearer '.$token);

$ch = curl_init("http://magento2.dev/rest/V1/products/".$sku."/media"); 
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST"); 
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($data)); 
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); 
curl_setopt($ch, CURLOPT_HTTPHEADER, array("Content-Type: application/json", "Authorization: Bearer " . $token));

$response = curl_exec($ch);
if ($response == '1'){
  echo 'video ajoutee ok'
}
else {
  var_dump($response);
}