Google Merchant Center has updated its guidelines to help advertisers replace product videos more efficiently. The help page now emphasizes that using a new unique URL for video updates prompts a quicker recrawl, typically within 24-72 hours. In contrast, keeping the same URL could delay updates by up to six weeks.
Additionally, a new section on Shopping policy compliance has been added, enforcing that all video assets must adhere to Google’s advertising and content guidelines. Products with updated URLs will be listed as “Under Review” until processed, while older video content continues to serve during this period.

Read the official help page found by Hana Kobzová: Video link [video_link] – Google Merchant Center Help.