Requests and bugs

1. I don’t plan to make that a feature in the future.
2. You can start a video muted by adding volume="0" to the shortcode.
3. The plugin setting is called “Max embedded video dimensions,” not “Fixed video dimensions.” If your videos are set to 480×480 my guess is it’s because they are 480×480. If the video dimensions are less than the max video dimensions setting, the plugin defaults to the actual size of the video because it’s a bad idea quality-wise to scale them up. If you’re having that problem with a video that is actually 600×600 then we’re looking at a bug.

It seems like you’re going to post a lot of videos that will have exactly the same settings. I recommend customizing your theme to do a lot of this work for you. You could have each video page grab child videos and execute the shortcode using code like this. I haven’t tested this particular code so it may require some adjustment.

$args = array(
	'numberposts' => null,
	'post_mime_type' => 'video',
	'post_parent' => get_the_ID(),
	'post_status' => null,
	'post_type' => 'attachment',
);
$video_attachments = get_posts($args);
if ( $video_attachments ) {
	foreach ( $video_attachments as $video ) {
		$movie_url = wp_get_attachment_url( $video->ID );
		$shortcode = '[KGVID width="600" height="600" volume="0"]'.$movie_url.'[/KGVID]';
		echo do_shortcode($shortcode);
	}
}

5. This is most likely happening because you’ve changed another setting on the page while the thumbnails are generating. Any change you make to the video options will save the form and refresh it, interrupting the generating process.

Sorry, I’ve been busy with work. I’m unable to reproduce that bug on my computer. What browser are you using? Does it happen in other browsers?