DVDs at Walmart would be covered by sales tax, as would satellite and cable TV, unless it's a basic subscription.
From Pa. Code § 9.2. Sales and use tax changes:
(2) Pay television. Pay television except for ‘‘minimum pay television’’ is taxable. This includes anything charged to a customer for a service other than minimum pay television service. For example, if a cable television customer purchases basic service and in addition purchases a ‘‘pay’’ channel, tax is owed on the price charged for the ‘‘pay’’ channel. Installation and repair service for pay television with the exception of minimum pay television also is subject to tax.
From Pa. Code § 9.2. Sales and use tax changes:
(2) Pay television. Pay television except for ‘‘minimum pay television’’ is taxable. This includes anything charged to a customer for a service other than minimum pay television service. For example, if a cable television customer purchases basic service and in addition purchases a ‘‘pay’’ channel, tax is owed on the price charged for the ‘‘pay’’ channel. Installation and repair service for pay television with the exception of minimum pay television also is subject to tax.