$chandet = channeldetails(12567);
print_r($chandet);
foreach ((array) $chandet as $det) {
    echo $det . "<br>";
    echo "<br>";
    echo "<br>";
    echo "<br>";
    echo "<br>";
    echo "<br>";
    print_r($det);
    // exibit 2 for this print-r output
    foreach ((array) $det['videos'] as $ails) {
        foreach ((array) $ails as $value) {
            echo $value . "<br>";
        }
    }

}

[videos] => Array
    (
        [0] => Array
            (
                [channel_video_id] => 3433
                [channel_id] => 342333
                [video] => pathtofile/something.mp4
                [start] => 0
                [length] => -1
                [sort_order] => 0
                [is_ad] => 0
            )

        [1] => Array
            (
                [channel_video_id] => 2364
                [channel_id] => 342333
                [video] => pathtofile/something.mp4
                [start] => 0
                [length] => -1
                [sort_order] => 1
                [is_ad] => 0
            )

    )

      )