Watch the video:
Timestamps:
0:00 - Explanation
0:21 - Connection to the router & Crowded network
0:47 - Restarting 
1:01 - Port forwarding
1:16 - Sudden lag? Only you? Try a VPN
1:47 - In-game settingsPlaying Black Ops: Cold War, but you have a laggy connection? Strange stuttering or rubber banding? This video covers a lot of different topics that can help improve your connection to the game servers overall, so you can have a smoother, more enjoyable gaming experience.
Port forwarding guide: Go to post or [View on YouTube](Go to post or View on YouTube)
Optimizing Cold War: Go to post or [View on YouTube](Go to post or View on YouTube)
EVERY SETTING BENCHMARKED: Go to post or View on YouTube
Other Black Ops: Cold War videos:
- [NEW] Fix Fatal Errorr 3107840166 + More: Go to post or View on YouTube
 - BEST Optimization guide: Go to post or [View on YouTube](Go to post or View on YouTube)
 - BETA: Fix Random Crashes: Go to post or View on YouTube
 - Change Activision Name: Go to post or View on YouTube
 - Fix “Cannot Connect to Online Services”: Go to post or View on YouTube
 - Fix “Lobby, not Joinable”: Go to post or View on YouTube
 - Fix Blurry Vision In-Game: Go to post or View on YouTube
 - Fix Fatal Error 3107840166: Go to post or View on YouTube
 - Fix Fatal Error Guide: Go to post or View on YouTube
 - Fix High CPU Usage: Go to post or View on YouTube
 - Fix Infinite Shader Install: Go to post or View on YouTube
 - Fix Infinite loading screens: Go to post or View on YouTube
 - Fix Lag/Improve connection: Go to post or View on YouTube
 - Fix Lost Connection to Host: Go to post or View on YouTube
 - Fix Stutter, Drops & Stabilize FPS: Go to post or View on YouTube
 - Fix Umbrella Merge Conflict: Go to post or View on YouTube
 - HD Texture Pack Benchmark: Go to post or View on YouTube
 - Lower VRAM Usage: Go to post or View on YouTube
 - OPEN NAT [Port Forwarding]: Go to post or [View on YouTube](Go to post or View on YouTube)
 - Skip intro: Go to post or View on YouTube