Sounds like standard valve/lifter ticking. Might need to be adjusted as most people never adjust valves.

The vibration could be about anything. Nicked prop, rudder play to 1 side while turned, prop shaft bearing and/or seal, etc. list goes on and on.

On the back side of the engine, between the rear seat and and rear of motor, there appears to be water around the bottom. Any idea where this is coming from? I would assume the prop shaft dip seal and if that is failing it could cause a little vibration and water in the bilge.