If I understand well, GNU Gnash is now focused only on format Flash 8 and before (ActionScript 1.0 & 2.0, with environment AVM1) and won't support AVM2, as Lightspark implements format Flash 9 and later (ActionScript 3.0, with environment AVM2).
So for that you will need ro install also Lightspark : http://sourceforge.net/apps/trac/lightspark
Normally, each one should include a fallback to the other when it reads a video needing the other environment.
If I understand well, GNU Gnash is now focused only on format Flash 8 and before (ActionScript 1.0 & 2.0, with environment AVM1) and won't support AVM2, as Lightspark implements format Flash 9 and later (ActionScript 3.0, with environment AVM2).
So for that you will need ro install also Lightspark : http:// sourceforge. net/apps/ trac/lightspark
Normally, each one should include a fallback to the other when it reads a video needing the other environment.