Während der Videokonferenz soll niemand unterbrochen werden.

Here, während means during.

In this sentence, it is a preposition, because it is followed by a noun phrase: der Videokonferenz.

So:

• während der Videokonferenz = during the video conference

Be careful: während can also be a conjunction meaning while, but then it introduces a whole clause, for example:

• Während ich arbeite, höre ich Musik. = While I work, I listen to music.

In your sentence, it is clearly the preposition use.

Während traditionally takes the genitive case in standard German.

So:

• die Videokonferenz → base form
• während der Videokonferenz → genitive

Because Videokonferenz is a feminine noun, the genitive singular article is der.

A useful note: with feminine singular nouns, der can also look like the dative form, so learners often get confused here. But after während, standard written German normally expects the genitive.

German often puts a time expression at the beginning of the sentence to set the scene first.

So this sentence starts with:

• Während der Videokonferenz = During the video conference

That part is the topic or time frame, and then the rest of the sentence follows.

You could also say:

• Niemand soll während der Videokonferenz unterbrochen werden.

That means the same thing. Starting with the time phrase just gives it a slightly different emphasis.

This is because German main clauses follow the verb-second rule.

The first position is taken by:

• Während der Videokonferenz

So the finite verb must come next:

• soll

Then comes the subject:

• niemand

So the structure is:

• Während der Videokonferenz / soll / niemand / unterbrochen werden

If the sentence started with the subject instead, then you would get:

• Niemand soll während der Videokonferenz unterbrochen werden.

Both are correct.

Here soll means something like:

• should
• is supposed to
• is meant to

So the sentence expresses a rule, expectation, or instruction:

• Nobody should be interrupted during the video conference.

It does not necessarily mean that nobody actually is interrupted. It means that this is what is expected or required.

The sentence uses the passive voice because the focus is on the person affected, not on the person doing the action.

Active version:

• Während der Videokonferenz soll niemanden unterbrechen. ❌
  This is incorrect as written.

A correct active version would need a subject, for example:

• Während der Videokonferenz soll man niemanden unterbrechen.
• During the video conference, one should not interrupt anyone.

Passive version:

• Während der Videokonferenz soll niemand unterbrochen werden.
• During the video conference, nobody should be interrupted.

So the passive is used to emphasize nobody as the person receiving the interruption.

This is the passive infinitive structure.

It consists of:

• unterbrochen = past participle of unterbrechen
• werden = the passive auxiliary

Together:

• unterbrochen werden = to be interrupted

Because there is already a modal verb (soll), both parts stay at the end of the clause.

So the structure is:

• niemand soll unterbrochen werden

Compare:

• Er wird unterbrochen. = He is being interrupted.
• Er soll unterbrochen werden. = He should be interrupted.

The verb unterbrechen is an inseparable verb.

The prefix unter- here is inseparable, so the past participle does not take ge-:

• unterbrechen → unterbrochen

Compare:

• inseparable: unterbrechen → unterbrochen
• separable verbs often do use ge-, for example:
  • anrufen → angerufen

This is an important pattern in German: many verbs with inseparable prefixes do not add ge- in the past participle.

Because niemand is the subject of the sentence, and the subject is in the nominative case.

In the passive sentence:

• niemand = the one who is affected by the action
• grammatically, it functions as the subject

So:

• Niemand soll unterbrochen werden. = Nobody should be interrupted.

If you made the sentence active, then niemanden would appear as an object:

• Man soll niemanden unterbrechen.
• One should not interrupt anyone.

So:

• niemand = nominative subject
• niemanden = accusative object

Yes, in many contexts you could say that.

• Niemand soll unterbrochen werden.
• Keiner soll unterbrochen werden.

Both can mean Nobody should be interrupted.

However, niemand is usually the more neutral and standard choice in this kind of sentence. Keiner can sound a little more conversational or emphatic depending on context.

So for a general rule or formal instruction, niemand is very natural.

Yes. Videokonferenz is a standard German compound noun made from:

• Video
• Konferenz

German very often combines nouns into one word, so:

• Videokonferenz = video conference

And because it is a noun, it is capitalized:

• die Videokonferenz

This is completely normal in German.

Yes, the meaning stays basically the same, but the emphasis changes.

For example:

• Während der Videokonferenz soll niemand unterbrochen werden.
• Niemand soll während der Videokonferenz unterbrochen werden.

Both mean:

• Nobody should be interrupted during the video conference.

The first version emphasizes the time setting first. The second version emphasizes nobody first.

German allows this kind of flexibility, but the finite verb in a main clause still has to stay in second position.