Videohovor je na obrazovce.

Videohovor means video call.

It is a compound noun:

• video = video
• hovor = call, conversation, talk

So Czech combines them into one word: videohovor.

Je means is. It is the 3rd person singular form of the verb být = to be.

So:

• Videohovor je na obrazovce.
• The video call is on the screen.

Unlike in some languages, Czech usually keeps the verb to be in this kind of present-tense sentence.

Because the preposition na here means on, and with this meaning it requires the locative case.

The noun is:

• obrazovka = screen

In the locative singular, it becomes:

• na obrazovce = on the screen

So the ending changes because Czech nouns change form depending on their role in the sentence.

Obrazovce is in the locative singular.

Here is the pattern:

• nominative: obrazovka
• locative: na obrazovce

The locative is commonly used after certain prepositions, including na when it means location.

Yes. In this sentence, na means on because it shows location:

• na obrazovce = on the screen

But na can also have other meanings depending on context, for example:

• to/for in some expressions
• at in some places or events
• sometimes it can suggest direction when used with a different case

So you should learn na together with the case and the meaning in each context.

Czech does not have articles like a, an, or the.

So:

• Videohovor can mean a video call or the video call
• na obrazovce can mean on a screen or on the screen

The exact meaning usually comes from context.

Not completely. Czech word order is more flexible than English.

The neutral order here is:

• Videohovor je na obrazovce.

But other orders are possible, for example:

• Na obrazovce je videohovor.

That version may put more focus on on the screen or sound more natural in a context where you are describing what is visible.

Even though the order can change, the case endings help show the grammatical roles.

A rough pronunciation guide is:

• Videohovor ≈ VID-eh-oh-ho-vor
• je ≈ yeh
• na ≈ nah
• obrazovce ≈ ob-ra-zov-tseh

A few notes:

• v is pronounced like English v
• h is a real h sound
• c in Czech is pronounced ts
• j is pronounced like English y in yes

No. Obrazovka is a general word for a screen or display.

It can refer to:

• a computer screen
• a phone screen
• a TV screen
• another display surface

So na obrazovce simply means on the screen, and the exact type of screen depends on context.

Not normally in this sentence.

Czech usually says:

• na obrazovce = on the screen

Using v / ve would mean in rather than on, and that is not the usual way to talk about something being displayed on a screen.

So for this meaning, na obrazovce is the natural choice.