Please, support my new Cinematic in UE5. And maybe give some advice?

What do you guys think about it? I worked hard on this and I will appreciate any feedback and support, thank you!
Btw I am new to Unreal and it is my second Cinematic.

Somebody knows how to get rid of shadow flickering like on 0:44 and 0:47 and how to make shadows look better on distance? Look at the clipped shadow on 0:13. And also how to make better water reflections?