Takes ages to upload

Fatal error: Cannot instantiate non-existent class: ffmpeg_movie in /home/public_html/Videos/include/classes/class.video_duration.php on line 54

when its finished uploading and thats after a while and it is the correct file it will take me back to the start
Name, tags and so on and then upload again.

also how can i change it so it uploads all major video formats

so how can i resolve these issues?