You should use the Custom Audiences for your Google Video campaign, you want to reach people who browsed similar websites to yours.

• Infinite Taxonomy Audiences
• Life Events
• Affinity Audiences
• Custom Audiences

The correct answer is: Custom Audiences

Explanation: To reach people who have browsed similar websites to yours for your Google Video campaign, you should use a custom segment. This audience solution allows you to add specific keywords, URLs, and apps related to your product or service. Google Ads will then display ads to people who are likely to be interested in those keywords on pages, apps, and videos. Custom segments let you decide how you want to reach your ideal audience and can be set up in your Display, Discovery, Gmail, Standard Shopping, and Video campaigns. The system will choose a segment based on your campaign goals and bidding strategy, such as reach, consideration, or performance.