Learn Spanish (Latin America): A ellos les gustan los videojuegos nuevos.

In Spanish, gustar works differently than "to like" in English. It actually means "to be pleasing to". Since the video games are doing the pleasing, and there is more than one video game, the verb needs to be in its plural form: gustan. You use gusta for singular things or activities, and gustan for plural things.

Why are both A ellos and les used? Don't they both mean "to them"?

Yes, they do! In Spanish, the short pronoun les is completely required when using gustar to say "they like" or "you all like". The extra phrase A ellos is just added for clarification. Because les can mean "to them" or "to you all", adding A ellos makes it totally clear who we are talking about.

Why is the word los included? The translation doesn't say "the new video games".

When you talk about liking or disliking things in Spanish, you almost always need to use the definite article (el, la, los, or las) before the noun. Even if we drop the word "the" in English when talking about a general category of things, Spanish requires it.

Why is the adjective nuevos placed after videojuegos?