У вашего броузера проблема в совместимости с HTML5
In this video you can see how the Ultimate Wesker Boss mod looks in game. I'm using wilsonso's Resident Evil 5 Model Swap Trainer to use Wesker in story mode, and also for using melee swaps.
Download link:
http://residentevilmodding.boards.net/thread/29/wesker-boss-pack