To make a video call on WhatsApp Web follow these simple steps
STEP 1: Go to https://web.whatsapp.com/
STEP 2: Log in to the web by scanning your device with the QR code displayed on the web.
STEP 3: On the right-hand side of the window click on the link beside Make calls from Desktop with WhatsApp.
STEP 4: Click on Download for Windows.
STEP 5: A new window will open up
STEP 6: Open a chat for a video call and click on the video icon in the top right corner.
STEP 7: Now you are ready for the Video call using WhatsApp web in Laptop.