Securely embed video in post text

Question

PHP

The first time I ran into the problem of inserting the video code into the text (normal textarea, in general). There are various player codes at the input (for example, auto-generated YouTube, RuTube and others), it is necessary to implement their safe insertion into the text of the entry. All attempts to insert "wrong" code should be blocked. How to distinguish safe player code from potentially unsafe?

Answer 1

make a list of url-addresses of allowed players, www.youtube.com , rutube.ru ,…
also add allowScripAccess=never and allowNetworking=internal when inserting SWF, these options restrict flash drive access to other scripts and network resources.

<param allowScriptAccess="never" allownetworking="internal" name="movie" value="http://www.youtube.com/...."></param>