Snimka predavanja je već na mreži.

Because predavanja is in the genitive singular.

• predavanje = lecture
• snimka predavanja = recording of the lecture

In Croatian, possession or the idea of of something is often expressed with the genitive case. So this is literally:

• snimka = recording
• predavanja = of the lecture

If you said snimka predavanje, that would be ungrammatical.

mreži is in the locative singular.

The basic noun is:

• mreža = network, web

After na when it means on/in a location, Croatian uses the locative:

• na mreži = on the web / online

So the ending changes like this:

• nominative: mreža
• locative: mreži

This is a normal feminine noun pattern.

In this expression, Croatian idiomatically says na mreži for online / on the web.

Even though English learners may expect in the network, Croatian uses na here, just as English says on the internet, on the web, online.

So:

• na mreži = online / on the web
• u mreži would usually suggest being physically or conceptually inside a network, and it does not sound right here for ordinary online meaning.

Yes, snimka here means recording.

It can refer to:

• an audio recording
• a video recording
• sometimes a captured image or clip, depending on context

In this sentence, snimka predavanja most naturally means the recording of the lecture, often a video recording if it was a class or talk.

A related word is:

• snimanje = recording, filming, the act of recording

So:

• snimka = the finished recording
• snimanje = the process of recording

Je is the 3rd person singular present of biti = to be.

Here it means is:

• Snimka predavanja je već na mreži.
• The lecture recording is already online.

In standard Croatian, you normally keep je in a sentence like this. Omitting it would sound incomplete or nonstandard in ordinary speech and writing.

Also note that je is a clitic, which affects word order. It tends to appear near the beginning of the sentence, often in the second position.

This is because je is a clitic, and Croatian clitics usually go in the second position of the clause, not necessarily after the first single word.

In this sentence, Snimka predavanja functions as one opening unit/topic, and then je follows it:

• Snimka predavanja je već na mreži.

So the placement is natural and standard.

You may hear different word orders in Croatian, but clitics like je still follow special placement rules.

Već means already.

In this sentence:

• Snimka predavanja je već na mreži.
• The recording of the lecture is already online.

It comes before the phrase na mreži, but Croatian word order is flexible, so već can sometimes move for emphasis.

For example:

• Snimka predavanja je već na mreži. = neutral
• Već je na mreži snimka predavanja. = possible, but more marked/stylistic

For learners, the original sentence is a very natural default pattern.

Yes, it is correct and understandable, but the exact frequency depends on context and style.

Common expressions include:

• na mreži = online / on the web
• na internetu = on the internet
• online = online, very common in modern usage

So all of these may appear in real Croatian, but they are not always identical in tone:

• na mreži can sound a bit more native or formal/institutional
• online is very common in everyday modern language
• na internetu is also very common and very clear

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

So:

• snimka can mean a recording or the recording
• predavanje can mean a lecture or the lecture

The exact meaning comes from context.

In Snimka predavanja je već na mreži, English usually translates it as The lecture recording is already online because the context probably refers to a specific lecture and its recording.

Yes. Croatian word order is more flexible than English, but changes often affect emphasis, style, or information focus.

The original sentence:

• Snimka predavanja je već na mreži.

is a natural neutral version.

Other possible orders may include:

• Već je snimka predavanja na mreži.
• Na mreži je već snimka predavanja.

These are possible, but they sound different in focus. For example:

• starting with na mreži emphasizes the location/state
• starting with već emphasizes already

For learners, it is best to use the original version until you get comfortable with Croatian information structure and clitic placement.

A rough pronunciation guide is:

SNEEM-kah pred-AH-vah-nyah yeh VETCH nah MREH-zhee

A few helpful notes:

• sn at the start of snimka is pronounced fully
• nj in predavanja sounds like the ny in canyon
• j in Croatian sounds like English y
• ž sounds like the s in measure
• ć in već is a soft ch-like sound

This is only an approximation, but it can help you get close.