Luke, this is that shrub we were wondering about and thought was viburnum! Duh, it's Buttercup Winter Hazel of course!
Slow growing, blooms early spring and may rebloom if you're good in the fall...
"Tassells of primrose-yellow flowers lend this broadleaf deciduous shrub the name "buttercup," appearing at the cusp of spring, a mite earlier than the majority of our garden's deciduous shrubs. The buds begin to open at the tail-end of winter but are at their peak of beauty late March & early April.
Buttercup Winter Hazel"