AlterVideo Safari Extension
Show your support (Suggested: $5)
Open pages will need to be reloaded in order to use your newly installed extension.
Make sure to instal the Perian QuickTime Plugin for full Flash Video (FLV/F4V) playback support.
AlterVideo forces flash/embedded movies to use the HTML5 Video player when possible.
AlterVideo is currently designed to work in a generic manner,
detecting and loading videos when possible without support for specific sites.
YouTube users should instal the excellent 3rd party YouTube5 Safari Extension
Here are the changes in the latest version: