Wow that is quite a leak!
Whenever i have trouble diagnosing an oil leak, i use the UV dye... because oil leaks don't always come from where you think they are.
I repaired a briggs engine with it, another "pro" shop replaced the crankcase gasket, oil seals etc, to stop a leak that gathered dirt all under the engine, i removed the engine, cleaned it up really good. put it on a test stand, put some dye in the oil, and within a few minutes, an $2.00 O-Ring that seals the oil pump cover began weeping oil... very rare for one of those to leak.