У вашего броузера проблема в совместимости с HTML5
Music- FLiX-To a higher dimension (https://www.youtube.com/watch?v=HSivf4D8RDk)
In case video wasn't clear
Step 1-Go to Documents
Step 2-Go to My games
Step 3-Go to Far Cry 4
Step 4- Select the GamerProfile.xml file
Step 5- Right Click on it and select Edit
Step 6- Find ' Fullscreen="0" ' in there.
Step 7- Change 0 to 1 ' Fullscreen="1" '
Step 8- Save the file
Step 9- Run FarCry4.exe
Step 10- Enjoy.