To quickly sample TV shows and movies, you can set Netflix to play previews automatically.
From a web browser, go to your Account page.
Open the Profile & Parental Controls settings for the profile you want to use.
Select Playback settings.
Check Autoplay previews while browsing on all devices.
To stop autoplaying previews, uncheck the box.
You may need to refresh your device to pick up the updated settings.
Switch to another profile, then switch back.
Or, sign out of your device and sign back in.
If you're using a mobile phone or tablet, update the app: