The Canadian RP Churches have put together a series of video Psalm meditations by various pastors.   You can watch them below:

The Psalms Sung is a website where you can access a vast library of recordings of psalm singing. The psalms being sung are from different psalters, and to a range of tunes.

The book of Psalms contains 150 singable, God-inspired songs. This site offers information on various Psalters and tunes for use in Psalm singing.