To play video formats %S, you need to install extra Microsoft software, see https://support.mozilla.org/kb/fix-video-audio-problems-firefox-windows
Mus urrainn dhut fòrmatan video %S a chluich, feumaidh tu bathar-bog eile o Microsoft a stàladh, faic https://support.mozilla.org/kb/fix-video-audio-problems-firefox-windows