For example : Billboard for Picture
and ..... for videos,whether the billboard can be used for video?
please answer me.

Yes, there can also set video. But only a very short videos. If you want to show longer videos there, you have a peep the name,
Enter "Alvin Swazonegger". Then you can enter films of unlimited size. The picture quality is very modest. You'll probably be disappointed.
LG
wojoma