Tento film má dlouhý název.

Tento means this and is a stronger, more explicit form than ten.

In everyday Czech, ten can sometimes mean that, but it is also very often used where English would use the or sometimes even this, depending on context.
So:

• tento film = this film (clear, explicit)
• ten film = often that film, but in real speech it can also refer to the/that/this film depending on context and emphasis

For a learner, tento is the safest match for English this.

Also, tento agrees with film:

• masculine
• singular
• nominative

So the form has to match the noun it goes with.

Má is the 3rd person singular present tense form of the verb mít, which means to have.

The subject is tento film = this film, which is grammatically it in English.
So:

• já mám = I have
• ty máš = you have
• on/ona/ono má = he/she/it has

Since film is singular, you use má = has.

So the structure is:

• Tento film = subject
• má = has
• dlouhý název = a long title/name

Film is in the nominative case because it is the subject of the sentence.

The thing doing the having is this film, so it is the subject:

• Tento film = nominative
• má = has
• dlouhý název = object

In Czech, subjects are normally in the nominative.

Název is in the accusative case because it is the direct object of má.

The verb mít usually takes an accusative object:

• mít co? = to have what?

So here:

• má název = has a title

Why does it look unchanged? Because název is a masculine inanimate singular noun, and for many masculine inanimate nouns, the accusative singular is the same as the nominative singular.

So:

• nominative: název
• accusative: název

That is completely normal.

Dlouhý is the adjective long, and it must agree with název.

Since název is:

• masculine
• singular
• inanimate
• accusative

the adjective also takes the matching form dlouhý.

This can be confusing because the ending -ý is also used in the nominative masculine inanimate singular. In this sentence, the object is accusative, but for masculine inanimate singular, the adjective form is the same as nominative.

So:

• nominative: dlouhý název
• accusative: dlouhý název

Same form, different function.

Czech has no articles like English a/an and the.

So Czech simply says:

• film = film / a film / the film
• název = title / a title / the title

Whether the meaning is definite or indefinite usually comes from:

• context
• word order
• demonstratives like ten or tento

Here, tento film already makes the subject specific: this film.
But dlouhý název has no article, and English has to choose something like a long title or the long title based on meaning.

Yes, Czech word order is fairly flexible, but different orders can sound more neutral, more emphatic, or more context-dependent.

The most neutral order here is:

• Tento film má dlouhý název.

You could also hear:

• Dlouhý název má tento film.
• Tento film dlouhý název má.

But these alternative orders usually add emphasis or sound more marked.

For learners, the best default is: subject + verb + object

So this sentence is a very natural basic pattern.

A rough pronunciation guide is:

TEN-to film maa DLOU-hee NAA-zev

A few helpful points:

• Tento: stress on the first syllable: TEN-to
• má: long á, so hold the vowel a bit longer
• dlouhý: dlou sounds roughly like dlou in glow
  • oo blended together; stress on the first syllable
• název: long á again, stress on the first syllable

In Czech, stress is usually on the first syllable of each word.

Also:

• ý is a long vowel
• á is a long vowel

So the vowel length in má, dlouhý, and název matters.

Název usually means title, name, or designation of a thing such as:

• a film
• a book
• a song
• a company
• a place in some contexts
• an object or concept

For a film, název is the normal word for title.

Jméno usually means a person’s name or sometimes the name of an animal or a personified character.

So:

• název filmu = the title of a film
• jméno člověka = a person’s name

In this sentence, název is definitely the right word.

Yes, you could, but the nuance changes.

• Tento film má dlouhý název. = This film has a long title.
• Ten film má dlouhý název. = often That film has a long title, though in real Czech it may sometimes be used more loosely depending on context

If you specifically want to teach or learn a clear equivalent of English this, then tento film is the best choice.

If you use ten film, the meaning may depend more on context and tone.

This is a very common Czech learner question.

The reason is that both nouns are masculine inanimate singular, and in that gender/type the nominative and accusative often look the same.

So:

• subject: film = nominative
• object: název = accusative

But their endings do not visibly change here.

You identify their roles mainly by:

1. the verb
2. sentence structure
3. meaning

So even though both nouns look like dictionary forms, their grammatical roles are still different:

• Tento film = subject
• dlouhý název = direct object

This is normal in Czech and becomes easier with practice.