At a glance, you can find out how many have watched the replay/recording of your webinar. Note that they are not listed individually- only counted.
Step 1: Click the Statistics icon on the left menu in your account.
Step 2: Under Show Statistical Data For drop-down, select your webinar.
Step 3: After you select your webinar, the numbers on each stat below the drop-down should populate with their current values automatically. This is where you can find the current statistics for Replay Attendees.