YouTube embeds won't work on iPad (they work fine on laptop)

You can handle this in the theming layer. First download http://www.longtailvideo.com/players and place in your theme folder or custom module folder. Then if you don't have template.php in your theme create one and add

function THEMENAME_preprocess_node(&$vars) {
  if ($vars['node']->field_EMFIELDNAME['0']['value'] != NULL) {
  // Load JS for seamless failover between the Flash and HTML5 players.
  drupal_add_js(drupal_get_path('THEME OR MODULE', 'NAME OF THEME OR MODULE') . '/mediaplayer/jwplayer.js');
  $vars['scripts'] = drupal_get_js();
  $you_tube_id = $variables['field_em_video']['0']['value'];
  // Call the player setup and video file
  $jw = 'jwplayer("container").setup({flashplayer: "/' .
	drupal_get_path('THEME OR MODULE', 'NAME OF THEME OR MODULE') . '/mediaplayer/player.swf",
	file: "http://www.youtube.com/watch?v=' . $you_tube_id . '",
	height: 320,
	width: 470
    });';
  drupal_add_js($jw, 'inline', 'footer');
}

Then create a content-field-field_EMFIELDNAME.tpl.php and add <div id="container">Loading the player ...</div>.

When the browser doesn't support flash it renders HTML5. You can read about it in the JW player embedding PDF file in the longtail video download.

as a note: you can specify that youtube videos go through longtail in the settings.

however, also note that in the latest dev version, i've added support for youtube's native html5 support, so this should no longer be an issue. just check the 'html5' box in the module settings, under player options.

#2 doesn't work for me- I just get a parse error.
#3 says it has been fixed in the latest release. It hasn't. See http://drupal.org/node/1222646
This issue is not fixed.