htaccess file

Does anyone know how to create an htaccess file, then properly add the following to make html5 videos work:

AddType video/ogg .ogv
AddType video/mp4 .mp4
AddType video/webm .webm

Add a file in the top directory of what directory you would like to edit and name it .htaccess

try...

<IfModule mod_mime.c>

AddType video/ogg .ogv
AddType video/mp4 .mp4
AddType video/webm .webm

</IfModule>