A la nit, m'agrada mirar una pel·lícula amb la meva filla.

Yes. A la nit means at night / in the evening at night time, depending on context.

In Catalan, a + time expression is very common:

• al matí = in the morning
• a la tarda = in the afternoon
• a la nit = at night

So A la nit, m'agrada mirar... sets the time for the whole sentence: At night, I like to watch...

Yes, but the nuance is a little different.

• a la nit usually refers to during the night / in the evening at night time as a time frame for an action.
• de nit often means at night in a more general contrast with during the day, or it can sound a bit more like by night / nighttime.

In many everyday contexts, both are possible, but a la nit is very natural here.

Examples:

• A la nit, llegeixo. = At night, I read.
• Treballa de nit. = He/She works at night nights / on the night shift.

Because agradar works differently from English to like.

Catalan agradar is closer to:

• to be pleasing to
• to appeal to

So m'agrada mirar una pel·lícula literally works like:

• Watching a film is pleasing to me

That is why Catalan uses an indirect object pronoun:

• m' = to me
• t' = to you
• li = to him/her
• ens = to us
• us = to you plural
• els / els hi in some varieties = to them

So:

• M'agrada... = I like... literally It pleases me

Because the thing being liked is grammatically singular here.

The subject of agrada is the action:

• mirar una pel·lícula amb la meva filla

An infinitive phrase like mirar una pel·lícula... counts as singular, so Catalan uses agrada.

Compare:

• M'agrada mirar una pel·lícula. = I like watching a film.
• M'agraden les pel·lícules. = I like films.

In the second example, les pel·lícules is plural, so you get agraden.

M' is the shortened form of em.

• em = to me
• before a vowel, it becomes m'

So:

• Em gusta is not Catalan
• Em agrada becomes m'agrada

More examples:

• M'agrada = I like
• M'encanta = I love
• M'interessa = It interests me

This apostrophe is just normal Catalan spelling to avoid two vowels in a row.

Yes, both mirar and veure can appear in this area, but they are not exactly the same.

Very roughly:

• mirar = to look at / watch
• veure = to see

In everyday Catalan, mirar una pel·lícula is very natural for watching a film.

Compare:

• Miro una pel·lícula. = I watch a film.
• Veig una pel·lícula. = I see a film.

The second one is possible in some contexts, but mirar is the more straightforward choice when you mean actively watching it.

Because Catalan usually uses an article with countable singular nouns when you mean a film.

• una pel·lícula = a film / a movie

Without the article, it would sound incomplete in this sentence.

If you wanted to speak more generally, you might say:

• M'agrada mirar pel·lícules. = I like watching films.

So:

• una pel·lícula = one film, or a film in a habitual sense
• pel·lícules = films in general

Because Catalan normally uses the definite article before possessives.

So:

• la meva filla = my daughter
• el meu pare = my father
• la nostra casa = our house

This is one of the big differences from English.

However, in some family or very close relationship terms, especially in certain styles or dialects, the article can sometimes be omitted:

• ma mare
• mon pare

But for standard everyday learning, la meva filla is exactly what you should expect.

Here, amb means with:

• amb la meva filla = with my daughter

It is the normal Catalan preposition for accompaniment.

Examples:

• Vaig amb els meus amics. = I’m going with my friends.
• Sopa amb la família. = He/She has dinner with the family.

So in your sentence, it shows who the speaker watches the film with.

Yes, you could.

Both are grammatical, but the emphasis changes slightly.

• A la nit, m'agrada mirar una pel·lícula amb la meva filla. This puts the time first, so the sentence begins by setting the scene: At night...

• M'agrada mirar una pel·lícula amb la meva filla a la nit. This sounds more like a neutral statement first, with the time added afterward.

Catalan is fairly flexible with word order, especially with time expressions.

That middle dot marks a geminated l, written l·l in Catalan.

It shows that this is not the same as ll:

• l·l = two separate l sounds
• ll = the special Catalan sound similar to the lli sound in some pronunciations of million or brilliant

So:

• pel·lícula has l·l
• it is not spelled pellícula

This spelling appears in several Catalan words, such as:

• col·legi
• il·lusió
• paral·lel

• pel·lícula is stressed on the second syllable: pe-LÍ-cu-la
• agrada is stressed on the middle syllable: a-GRA-da

The written accent in pel·lícula tells you where the stress goes.

In agrada, there is no written accent because the stress already follows normal Catalan stress rules for that spelling.

Semantically, yes: the meaning is I like...

But grammatically, with agradar, the structure is a little different. The pronoun m' shows to me, and the thing that is pleasing is the infinitive phrase:

• mirar una pel·lícula amb la meva filla

Catalan often leaves out subject pronouns like jo when they are not needed, because the verb form and context are enough.

So you normally say:

• M'agrada mirar una pel·lícula...

not:

• Jo m'agrada... ❌

If you wanted to add jo, it would only be for emphasis:

• A mi m'agrada mirar una pel·lícula... = As for me, I like watching a film...

You would usually say:

A la nit, m'agrada mirar pel·lícules amb la meva filla.

Notice the changes:

• una pel·lícula → pel·lícules
• agrada stays singular, because the subject is still the infinitive phrase mirar pel·lícules

But if the noun itself is the subject after agradar, then the verb changes:

• M'agraden les pel·lícules. = I like movies.

So compare:

• M'agrada mirar pel·lícules.
• M'agraden les pel·lícules.

Both are correct, but the grammar is different.