add shadow behind video controls

<img width="1253" height="102" alt="Image" src="https://github.com/user-attachments/assets/c95dba4a-2dcb-4f95-b3ab-0eacc8a365b9" /> this can be unreadable at times





<img width="428" height="380" alt="Image" src="https://github.com/user-attachments/assets/dda71425-e9ac-4ac5-85a4-17d603f75bad" />