Vidéo impossibles à lire

Thank you. Everything seems to be fixed properly :

For exemple : CNEWS is activated. "Le direct" (live) doesn't work. The small screen (on the right side) is a replay perfectly read.

1. How can I know if a video is Flash or not ?

2. If not, how could I read it ?

This other channel offers the same problem :

     Here this screenshot shows the live; the screen is just black, no 'error' message :

    On the same channel, here this screenshot shows a replay; the video is read :

Thank you.