TinyMCE wysiwyg path incorrect

When video filter was uploaded I found a php warning for open_basedir.

I found this to be because of the TinyMCE path to incorrect path in video_filter_wysiwyg_plugin()

This was discussed in #767550: $meta['path'] value is expected to be a directory in wysiwyg.admin.inc:116, and file elsewhere. The path should only point to a folder and not a filename and use the new filename key for the file.

I have added the array key and testing seems to have resolved this.