Cybercut (https://cybercut.ai/) is an AI-assisted video editing app.

Three main features:

• Smartclip generates excerpts from a video oriented to social media posts.
• Video marketing generates promotional videos from images.
• AI caption adds subtitles and music to an imported video.

Other features are offered: image generation, addition or removal of backgrounds, etc.
Export mp4.

Free and seems unlimited.

Source for testing: https://tube.reseau-canope.fr/w/na7QpiFDQqtvxWRkwJmjdi