Yes! During session replay, you can find the initial viewport size at the top right corner of the screen.
It's important to note that session playback will not display any changes to the viewport size if the user decides to alter this during their session. However, we do index these viewport changes for search.
To find sessions with a specific viewport resolution, you can search for viewport width and/or viewport height in the OmniSearch box:
What's the difference between viewport and screen dimensions?
Screen dimension is the actual reported size of the device the user is on whereas the viewport dimension is the size of the user's visible area of a web page, primarily determined by the size of their browser window.