Go to cloud.metrica-sports.com and login. (If you don't have an account yet go to getplay.metrica-sports.com)
Click on the Settings icon and choose "Add Key" from the dropdown menu:
Add code SAMPLEGAME3 within the form and press Apply:
After this, your Key/Code will take effect on your account, and you should be able to see a new Video Project listed.
Open Play app in your computer.
Open or create a Workspace.
Import the Video Project and the video file with the tracking data from Cloud to Play, following the steps below:
Create a Playlist by clicking the "Add" icon:
Then type a playlist name and press Enter.
Play the video.
When you want to save a moment that just occurred as a clip, pause the video after the moment is complete. Then click on the "Save event/s on selected playlist" icon at the bottom right. 
By default, a video cut contains the 10 seconds leading up to the current point on the video.
That's it! You can now Add Visualizations to your playlists