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I was trying to combine and make a 30 minute video. Is this sentence correct?

I will make it within 30 minutes.

I was conducting a workshop and want to tell that it will be 30 minutes. Is this sentence correct?

I will make it within 30 minutes.

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mezzopianoI was trying to combine and make a 30 minute video. Is this sentence correct?

The "combine and make" seem confusing to me.

I was trying to combine different segments to make a 30-minute video.

I will make it within 30 minutes.

Yes. You could be asked how long will it take you to get here. You reply, "I will make it within 30 minutes."

Or when asked how long will it take you make the short video, you reply, "I will make it within 30 minutes."

I was conducting a workshop and want to tell that it will be 30 minutes. Is this sentence correct?

Not entirely correct. You start in the past. So you need to make sure your whole sentence agrees.

I was conducting a workshop and wanted to tell everyone that it would last for 30 minutes.

Notice the changes:

  • want to wanted (past tense)
  • added everyone, you usually tell someone
  • will to would (past tense)
  • assumed "be 30 minutes" meant "last for 30 minutes"

Although you have small errors, most people would likely understand you with the proper context. So you are doing good. Keep going.