Video

1. Each service is different. Carefully read their TERMS about commercial use.  Stock requires you to have copyright. If you don't have that, you can't submit content to Stock.

2. Do not upscale videos from their native format. Read the entire Stock Contributor User Guide. Start with these links.

• https://helpx.adobe.com/stock/contributor/help/submission-guidelines.html
• https://helpx.adobe.com/stock/contributor/help/generative-ai-content.html
• https://helpx.adobe.com/stock/contributor/help/video-editing-dos-and-donts.html
• https://helpx.adobe.com/stock/contributor/help/video-requirements.html

If you're serious about being a Stock contributor, you need good equipment & software. Mobile phones & free apps are not enough.

"Free" AI video upscalers generally have a catch where you can generate two or three examples for free before they require payment. And those free ones most likely include watermarks, meaning they cannot be used commercially.

You'll need to check the T&C's of any products you use to create AI assets to determine wheter they allow commercial use of any assets  generated.