Sky puck resetting

[Freezing_]

Every time I try and watch a program in my playlist the sky puck freezes and then restarts and I can't watch it

[lettice]

 You have not mentioned anything you have tried.

Would suggest trying a restart of your Sky Stream box
Go to Settings>Systems Management>Resets & Updates
Select Restart device
Your Sky Stream puck will perform a reboot. It will take a few minutes to complete.

Different ways to get to the above mentioned settings menu;
Hit the . . . button on your remote and select settings, use voice saying 'settings' or scroll down to the settings menu on the home menu.

Plus,

Can you do a network speed test on each of your Pucks, to see if you are experiencing any local network connection issues.
Launch Netflix on your pucks (you do not need to be logged into it, if you do not use netflix) and scroll down the left menu to Get help.
Choose Check Network.
Would suggest running the test a few times, say a few minutes between tests.
What is your speed?

Sky recommended minimum available broadband speed is 25Mbps.

Or 30Mbps if you add an extra Sky Stream puck or to watch in UHD.

If you use the Sky Sports live sync options, each puck uses a few extra Mbps.