Effortless B-Roll Creation for Every Need
Try it free →1 free video · no credit card
This page is about the workflow rather than the aesthetics: how generated b-roll actually enters an existing edit. Most people arriving here are not building faceless videos, they are editors with a timeline, a voice track and gaps where a cutaway should go. The relevant questions are practical - what aspect ratio to export, how long each clip needs to be, how to keep twelve inserts looking like one production, and when generating is genuinely faster than searching a stock library. The answer is not always generate, and knowing which case you are in saves more time than any prompt technique.
Generate when the shot is specific: a described historical moment, a process nobody films, a scene that has to match a precise line. Use stock when the shot is genuinely interchangeable - a city street, a person walking, water - because a library clip is cheaper and instantly available. Reeloop supports both, with a stock-first mode for generic scenes, and the decision is really about whether the shot carries meaning or fills time. A useful test: if you could swap the clip for a different one without changing what the sentence communicates, stock is fine.
Decide the aspect ratio before generating, not after, since reframing a generated clip crops away composition that was built for the original frame. Reeloop exports 9:16, 1:1 and 16:9. Keep individual inserts short - three to five seconds is where generated motion stays clean, and longer clips are where drift becomes visible. If you need twelve inserts across one video, generate them in a single job with one style set rather than as twelve separate requests, because that is what keeps grading and light consistent. Then drop the MP4 into your editor and cut normally.
The expensive habit is generating first and judging after. Reeloop shows the full shot plan as text before anything renders, so the iteration that costs nothing is the one that happens at the prompt stage - rewriting a shot description is free, re-rendering it is not. For an editor, that maps to writing your insert list as text first, reviewing it as a list, then approving once. Scene-level re-rolls exist for the shot that comes back wrong, so a single weak insert does not mean regenerating the whole set.
Enter your topic or idea
Select your desired format
Customize with music and voiceover
Download and share your B-Roll video
You can create videos in vertical (9:16), square (1:1), and widescreen (16:9) formats.
Series mode automates daily video generation based on your chosen topics, keeping your audience engaged.
Yes - you choose the topic, style, voice, language, and captions, and Reeloop writes and renders the video to match. You can regenerate for a different take.
Related tools
No camera. No editing. Ready in minutes.
Start for free →1 free video · no credit card