I try both with sample, found x-fb-vlc using <object> tag works for both IE and no-IE (Chrome/Firefox) browsers.
During a few tries, x-fb-vlc is more reliable in IE than x-vlc-plugin. If put vlc plugin into product, which one is prefer to use?
Can add codebase = "http://rsatom.github.io/fbvlc/# " ?