Provide trailer in a fallback language when the original TMDB request doesn't provide one in the chosen localization

[StancuFlorin]

Description

When localizing to a language other than English, the data retrieved from TMDb is also localized to that language. As a result, the relatedVideos data attached to a movie in Overseerr may lack the necessary information to display the "view trailer" button on the movie/TV show details page.

Fortunately, the TMDb API supports multi-language requests, allowing you to fetch video data in multiple languages.
https://www.themoviedb.org/talk/6712613425c70b8b1d67ba57?page=1

I know that the request to TMDb includes include_video_language=en, en when using English. However, I think that this is a small trade-off compared to adding an additional conditional check in the code.

Screenshot (if UI-related)

To-Dos

• Successful build yarn build
• Translation keys yarn i18n:extract
• Database migration (if required)

Issues Fixed or Closed

• Fixes Provide trailer in a fallback language when the original TMDB request doesn't provide one in the chosen localization #1643