2007 Mercury Optimax Pro XS Serial #1B458912

Water is leaking where the gear housing and driveshaft housing meet. Also seems to be leaking from the lower mount and cover. I had a local mechanic install a new water pump kit, but it didn't fix the problem. Here is a short video of the problem.

https://www.youtube.com/@bobbylee5351/shorts

Can anyone help me identify the culprit? I just ordered a service manual.

Thank you all for the help.