Piston Failure

It's pretty low quality and bad lighting, but I pointed my inspection camera at the intake/head/block area and pressurized the system. You can see it reflecting as it's leaking. Hoping its a bad seal at the intake, maybe rtv sealing the valley squeezed up into part of the coolant port and somehow is causing a leak. I've sealed intakes dozens of times without problems, but there's a first time for anything. Imy open to opinions if someone has any other explanations.