How do I shoot video with a glass background?

[OM2]

How do I shoot video with a glass background - i.e. the back is daylight

Previously I've shot video inside with a bright window at the back - the result was a a disaster
I just assumed that it was a big no no to shoot video like this

I've just seen a few video on the net where they shoot video with a glass background
How do they do this?

The only way I can think of how they would do this is to have excessive lighting in the background (i.e. lighting the subject being filmed)

Thanks


OM

[guns1inger]

You need fill light in front of the subject, and you need to manually set the exposure so you can get a balance between the foreground light and the back light. Very difficult with most consumer cameras as they don't have enough manual control