AI Video Editing Prompts5 min readLast updated 2026-10-05

AI Prompts for B-roll Placement and Revisions

Use specific B-roll requests tied to spoken phrases and available footage. Review cutaway relevance, placement and speech continuity in Cubix.

Quick Takeaway

Put your main video on the timeline, inspect stock or uploaded footage in Add B-roll, and identify the passage a cutaway should support. Use the requests below to describe one placement or revision, then check the visual and original speech together.

Choose the passage and supporting footage

These are candidate requests for the Cubix AI video editor: adapt them to your available footage and review the result. They are instructional examples, not tested recipes. Quote the actual words where a cutaway belongs and name the source clip you want to use. A product screen recording can explain a feature more directly than generic office footage. Choose footage that supports this sentence, and decide when the speaker should become visible again.

Inspect Add B-roll before asking for placement

Add video to the timeline before opening Add B-roll. The picker offers stock footage and your uploads; inspect the available media before requesting an exact file. Choose and place the cutaway, then check its position over the main video. The picker places muted cutaways on a B-roll track; listen afterward to check the original narration and any other audio.

Requests for an uploaded clip or a topic-based choice

Have the main video on the timeline and the supporting media available. Replace each bracketed item with information from this project.

  • First request: Replace [exact filename] with the uploaded asset name and [exact source words] with the start of the spoken passage. Review whether the chosen visual appears over that passage and the narration stays intact.
Uploaded cutaway request
"Use the uploaded clip [exact filename] as a cutaway over the passage beginning “[exact source words]”. Keep the speaker's original audio and leave the rest of the edit unchanged."
Choose a cutaway by topic

Replace [exact source words] with the recorded sentence and [specific topic] with the thing it explains. Inspect the suggested footage in the picker; a search result is not proof that the visual matches your claim.

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Recommended Editing Command
"Help me choose a relevant cutaway for the sentence “[exact source words]” about [specific topic]. Use the available B-roll selection controls and let me review the visual before placement."

Requests to replace or shorten one cutaway

Identify the existing cutaway before revising it. If the conversation does not make the intended change, inspect the B-roll track and adjust the selected clip in the timeline.

  • First request: Replace [exact source words] with the passage beneath the existing cutaway and [exact available filename] with the replacement asset. Compare the other cutaways before and after the change.
Replace one cutaway
"Replace only the cutaway over “[exact source words]” with [exact available filename]. Keep the narration and the other cutaways."
Shorten one cutaway

Replace both bracketed phrases with words from the recording: the passage covered by the cutaway and the next phrase where the speaker should return. Watch that join with sound and check that no spoken word was cut.

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Recommended Editing Command
"Shorten the cutaway over “[exact source words]” so the speaker is visible again before “[next actual phrase]”. Keep the audio continuous."

Fictional example: match the visual to the sentence

In a fictional tutorial, the presenter says, “Open the analytics dashboard to compare this week with last week.” A recording of that dashboard can support the instruction; a handshake clip cannot show the comparison. Choose the relevant recording, then check whether labels remain readable during the cutaway. This is an editing illustration, not a product test.

Review the cutaway with sound

Watch the affected passage and the surrounding sentences before exporting.

  • Check that the selected visual supports what the speaker actually says.
  • Check the cutaway start and end, and the return to the speaker.
  • Keep captions and important UI labels readable.
  • Listen for continuous narration and unintended competing audio.
  • Review the downloaded video when you produce an export.
Common Mistakes to Avoid
✖ Choosing generic footage for a specific explanation.

Why it fails: The visual cannot show the feature or action being described.

✔ Better approach: Select a relevant uploaded recording or inspect stock results before placement.

✖ Changing several cutaways in one revision.

Why it fails: It becomes harder to tell which change affected the edit.

✔ Better approach: Name one cutaway and review that passage before the next revision.

✖ Assuming a filename guarantees exact placement.

Why it fails: A request still needs review against the actual source and timeline.

✔ Better approach: Check the chosen asset, timing and narration after the change.

Add B-roll to your video with Cubix

Start this editing workflow in Cubix

Select supporting footage, describe a placement or revision, and review the cutaway with the original narration.

Add B-roll to my video →

Frequently Asked Questions

Common questions around this editing workflow.

The picker includes uploaded footage. Make the recording available in the project, select it, and review its placement over the main video.
Using Cubix?

Relevant Product Documentation

Want to edit this way without doing everything manually?

Select supporting footage, describe a placement or revision, and review the cutaway with the original narration.