Check out this updated video on how to fix the leak:    • How to Fix a Common Interior Roof Lea...  

In this video, I show how I diagnosed and fixed a leak in the interior of my 2004 Honda Accord Coupe. Since fixing it, I've had minimal leaking issues. It was leaking every time there was a heavy rain, and it was starting to stain the headliner and airbag. I know this video may not be the best at showing how to remove the trim piece, but I'm willing to answer any questions you may have.
Buy the windshield gasket: https://amzn.to/2CNY0pq
Buy a new door seal: Right: https://amzn.to/2VrbM8q
Left: https://amzn.to/2F4M302