Open the Prime Video app on your iPhone or iPad
Now open the video you want to watch from Prime membership or available for purchase or rental.
To participate in the Watch Party, the host and attendees will need to purchase or rent separate memberships.
Select Watch Party from the details page.
Enter the desired username under Chat Name.
Then click on ‘Create Watch Party’ to generate a Watch Party link
Finally, invite friends using the "Share" icon or select Copy link to share through other available apps.