I have screen lag and fps dropped any idea how to fix it?

https://www.youtube.com/watch?v=dcyOInmMtos&feature=youtu.be

nothing special pick one item and leave your IGN.

'i'll remove the item once they've been taken'
1G2CAL Revolvers x2 for 5 days "Taken"
1G2CAL Revolvers x2 for 5 days "Taken"
Cannon Rocket for...

IGN: ^1Shana
Country: Israel