Leak_Outside Pane ls In Tact

This video focuses on the Aluminum Siding just under the roof of the annex part of this row house. This part (annex) of the row house is fully connected and is all the way on the back of this house, with the following dimensions:
Depth: 8'
Width: 14'
The annex roof in terms of altitude is located between the 1st and the 2nd Floor of the main house, around 28' above the ground in back of property.

The aluminum siding does not cover the inner corners of the external part of the annex, specifically where the annex fuses into the main row house.