Vor der Videokonferenz prüft meine Kollegin, ob die Webcam funktioniert.

German often puts a time expression first to set the scene. Vor der Videokonferenz means before the video conference, so it tells you when the action happens.

German word order is flexible, but in a main clause the conjugated verb still has to stay in second position. That is why after Vor der Videokonferenz, the verb comes next: prüft.

So the structure is:

Vor der Videokonferenz + prüft + meine Kollegin + ...

If you put the subject first instead, that is also correct:

Meine Kollegin prüft vor der Videokonferenz, ob die Webcam funktioniert.

Because vor takes the dative case here.

In this sentence, vor means before in a time sense, and temporal vor uses the dative:

• vor der Videokonferenz = before the video conference
• vor dem Meeting = before the meeting
• vor dem Unterricht = before class

The noun Videokonferenz is feminine, so:

• nominative: die Videokonferenz
• dative: der Videokonferenz

That is why you get vor der Videokonferenz.

Because the first element in the sentence is Vor der Videokonferenz, and in a German main clause the conjugated verb must be in second position.

This is the basic rule of verb-second word order:

• Meine Kollegin prüft ...
• Vor der Videokonferenz prüft meine Kollegin ...

In English, you can often move things around without affecting the verb much, but in German the finite verb has to stay in slot 2.

So it is not that the subject becomes unimportant. It is just that the time phrase has taken the first slot.

Kollegin means female colleague. It is the feminine form of Kollege.

Here, meine Kollegin is the subject of the main clause, so it is in the nominative case.

That is why you have:

• meine Kollegin = my female colleague

Compare:

• mein Kollege = my male colleague
• meine Kollegin = my female colleague

The ending -e in meine matches the feminine nominative singular noun.

prüfen usually means to check, to examine, or to test.

In this sentence, prüft means that your colleague is checking whether the webcam works.

So prüfen is a good, natural verb here. Depending on context, German speakers might also say:

• kontrollieren = to check/inspect
• testen = to test
• überprüfen = to verify/check thoroughly

But prüfen works very well in this sentence.

Ob means whether or sometimes if in the sense of whether.

Here:

..., ob die Webcam funktioniert.
= ..., whether the webcam works.

This is important because English if can translate into different German words:

• ob = whether
• wenn = if/when, for conditions or repeated events

So in this sentence, ob is correct because the colleague is checking whether the webcam works.

Examples:

• Ich weiß nicht, ob er kommt. = I don’t know whether he is coming.
• Wenn er kommt, reden wir mit ihm. = If he comes, we’ll talk to him.

Because ob introduces a subordinate clause, and in German subordinate clauses are separated from the main clause with a comma.

So:

Vor der Videokonferenz prüft meine Kollegin, ob die Webcam funktioniert.

The comma marks the boundary between:

• main clause: Vor der Videokonferenz prüft meine Kollegin
• subordinate clause: ob die Webcam funktioniert

German uses commas more regularly than English in this kind of structure, so learners need to get used to that.

Because ob die Webcam funktioniert is a subordinate clause, and in German subordinate clauses the conjugated verb usually goes to the end.

That is one of the most important German word-order rules.

Compare:

Main clause:

• Die Webcam funktioniert.

Subordinate clause:

• ..., ob die Webcam funktioniert.

So the verb moves from the normal second position to the final position because of ob.

In the subordinate clause, die Webcam is the subject, so it is in the nominative case.

The noun Webcam is feminine in German, so its nominative singular article is die:

• die Webcam funktioniert = the webcam works

Even though there is already another die/der earlier in the sentence, that does not matter. Each noun gets the form required by its own role in the sentence.

Usually, funktioniert is much more natural here.

For devices, machines, apps, internet connections, microphones, cameras, and so on, German commonly uses funktionieren to mean work:

• Der Drucker funktioniert nicht.
• Mein Mikrofon funktioniert.
• Die Webcam funktioniert.

arbeiten usually means to work in the sense of doing a job or being engaged in work, especially for people:

• Ich arbeite im Büro.
• Sie arbeitet viel.

For a device, arbeiten would sound unusual in this context.

Yes. Vor has several meanings depending on context, including:

• before in time: vor der Videokonferenz
• in front of in space: vor dem Haus
• sometimes in expressions like afraid of: Angst vor Hunden

In your sentence, it clearly means before in time.

So it is useful to learn prepositions together with:

1. the case they take
2. their common meanings in context

Yes, Videokonferenz is a normal German noun, and all German nouns are capitalized.

So you get:

• Videokonferenz
• Kollegin
• Webcam

German capitalization is much broader than English capitalization. In English, common nouns are usually lowercase, but in German nouns always begin with a capital letter.

Also, Videokonferenz is a compound noun:

• Video
• Konferenz

German makes a lot of compound nouns this way.

Yes. German allows several natural variations, as long as the grammar rules are followed.

For example:

Meine Kollegin prüft vor der Videokonferenz, ob die Webcam funktioniert.

This version starts with the subject instead of the time phrase.

Both are correct, but the emphasis is slightly different:

• Vor der Videokonferenz ... emphasizes the time first
• Meine Kollegin ... emphasizes the person first

That flexibility is very common in German, but the verb-position rules still stay the same:

• main clause verb in second position
• subordinate clause verb at the end