PUBG utilizes a browser inbuilt demo function which makes watching replays of your games incredibly easy.
Although not your typical demo, they provide a great overview of rotations and positions to give you a clear understanding of how to improve your game.
How do I watch a PUBG demo?
Navigate to the matchroom of the game you want to watch. Ensure the game was played within the last 30 days.
Find the ‘Watch demo’ button located in the ‘Overview’ page.
This will open a new window in your browser where the demo will begin to download.
Once the demo has been downloaded the game will appear with demo controls in the middle of the screen.
Clicking will begin the demo and you'll now be able to fly around the map with every player's health, equipment, and positioning visible.