Для общего плана нужен штатив.

Because для always requires the genitive case.

The base form is:

• общий план = a general plan / a wide shot

After для, both words change to genitive singular:

• общий → общего
• план → плана

So:

• для общего плана = for the wide shot / for the general shot

Нужен means needed / necessary / required.

It is the short form of нужный (necessary, needed), and in sentences like this it works like a predicate:

• Штатив нужен. = A tripod is needed.

This is a very common Russian pattern.

Because нужен agrees with штатив, which is masculine singular.

Forms of нужный in this use:

• нужен — masculine singular
• нужна — feminine singular
• нужно — neuter singular
• нужны — plural

Since штатив is masculine:

• нужен штатив

Compare:

• Нужна камера. = A camera is needed.
• Нужно кресло. = An armchair is needed.
• Нужны батарейки. = Batteries are needed.

Because штатив is the thing that is needed, and with нужен / нужна / нужно / нужны, that noun normally stays in the nominative.

So the structure is basically:

• [For X] needed is [thing]
• Для общего плана нужен штатив.

Even though the English translation might make it feel like tripod is an object, in Russian it behaves more like the subject of the sentence.

In the present tense, Russian usually does not use a separate verb for to be.

So where English says:

• A tripod is needed

Russian simply says:

• Нужен штатив

This is normal Russian grammar, not an omission or a casual shortcut.

Yes. Russian word order is flexible.

This sentence could also be:

• Штатив нужен для общего плана.

Both versions are grammatical, but the emphasis changes a little:

• Для общего плана нужен штатив. → emphasizes for the wide shot
• Штатив нужен для общего плана. → emphasizes the tripod

Putting для общего плана first makes the purpose or context come first.

In everyday Russian, общий often means general / overall, but in film, photography, and video contexts общий план commonly means a wide shot, long shot, or establishing shot.

So in this sentence, it likely refers to a camera shot type, not a written or strategic plan.

Yes, absolutely.

That means:

• I need a tripod for the wide shot.

Here:

• мне = to me / I
• нужен штатив = a tripod is needed
• для общего плана = for the wide shot

Russian often uses this pattern:

• Мне нужен... = I need...
• Тебе нужна... = You need...
• Нам нужны... = We need...

The main stress is:

• для о́бщего пла́на ну́жен штати́в

A rough pronunciation guide:

• для = dlya
• общего = OB-shchee-va
• плана = PLA-na
• нужен = NU-zhen
• штатив = shta-TEEF

A common learner difficulty is штатив, because the cluster шт at the start can feel unusual.