Magic:

aftre deleting LocalMovie filter from 525 line on utils.inc.php file

$oConfig->set('Filter.Custom', array (new HTMLPurifier_Filter_MyIframe(), new HTMLPurifier_Filter_LocalMovie(), (new HTMLPurifier_Filter_YouTube(), new HTMLPurifier_Filter_YoutubeIframe(), new HTMLPurifier_Filter_AddBxLinksClass()));

suddenly it starts work

All services in MyIframe are working good now...  what was that??? and how HTMLPurifier_Filter_LocalMovie() deletion can affect the site?