HunyuanVideo-Foley (description: https://huggingface.co/tencent/HunyuanVideo-Foley and demonstration: https://huggingface.co/spaces/tencent/HunyuanVideo-Foley) sounds videos from the original and an instruction (optional).

Up to 6 audios can be generated per uploaded video.
MP4 export and URL sharing.

Free and open-source.

Test since https://www.pexels.com/fr-fr/video/une-personne-qui-frappe-un-ballon-de-football-3192198 :

Test since https://www.pexels.com/fr-fr/video/un-homme-qui-court-sur-la-plage-3125907/ :

Testing since https://www.pexels.com/fr-fr/video/courses-de-velos-sur-route-2066560/ :

Testing since https://www.pexels.com/fr-fr/video/une-femme-interviewant-une-autre-femme-par-la-fenetre-3254197/ :