first , let me show the main part that to upload youtube video thumb
the it is
- imagePath will be the full path
- php script
$response = $youtube->thumbnails->set( $videoId, [ 'data' => file_get_contents($imagePath), 'mimeType' => 'image/png' ] );
result : upload success
for standard video, it tested : no problemfor short video, tested:
Q1: it return success ( no error ) , but the thumb load fail in playlist ( the playlist which in my studio) , another public playlist, still using the old thumb
Q2: when i want to remove / change the thumb, it said mobile app can update the short video thumb, i have iphone, and android ( samsung ) , cannot find any update button ( no matter in youtube player app or youtube studio app)
Q3. i have find a suggest solution, upload a 1X1 px transprent.png to to remove the thumb uploaded before (Q1, the thumb uploaded and display error) , still fail
i guess it is bug, and expect google / youtube develop to fix, if it is not bug, please tell anything wrong with it ? as i have tried to upload thumb for my standard video, it works.