Generate a new video
Square & landscape pad the portrait video with brand-color side bars
(no content lost, captions stay readable).
Mixed at 18% volume with a 1.5s fade-out. Use royalty-free
(pixabay,
uppbeat).
For TikTok, leave silent and add their licensed music in-app.
Renders take 60–120 seconds. Output is portrait MP4 (1080×1920) ready for TikTok/Reels/Shorts.