$hlsUrl = (string)($m['hls_url'] ?? '');
$chatRoomUrl = (string)($m['chat_room_url'] ?? '');
$embedUrl = (string)($m['embed_url'] ?? '');

$liveUrl = '';
$liveType = '';

if ($hlsUrl !== '') {
    $liveUrl = $hlsUrl;
    $liveType = 'hls';
} elseif ($chatRoomUrl !== '') {
    $liveUrl = $chatRoomUrl;
    $liveType = 'link';
} elseif ($embedUrl !== '') {
    $liveUrl = $embedUrl;
    $liveType = 'embed';
}