I see the swfobject snniped and I’m to try put my video to work...
but I have some js files that it are the config files. How put I the files one this snipped?
If you are talking about the js files for the snippet keep them in the directory and upload them to the server. If your flash files requires javascript then you need to make sure that the path to the file is correct according to where you place the js files.
I am not sure I understand, sorry. If you are referring to the js that will be used by your flash files, the paths need to be relative to index.php (modx root) since all documents are rendered from that point.
If you mean that the js files need to be inserted into the page content by your snippet, you want this:
$modx->regClientStartupScript('path_to_js_file');