To find the best keywords for YouTube videos, start by using YouTube’s autocomplete and related search suggestions to identify popular queries. Leverage tools like Google Trends, TubeBuddy, VidIQ, or KeywordTool.io for keyword research, focusing on long-tail keywords (e.g., "home workout for beginners no equipment") to reduce competition. Analyze competitor videos for their titles, descriptions, and tags. Optimize your video metadata by placing keywords in the title, description, tags, and even the video file name. Use trending topics and hashtags to boost discoverability, and monitor performance via YouTube Analytics, adjusting keywords or thumbnails to improve CTR. Example: For "home workout," target phrases like "10-minute home workout for women" based on search suggestions and tool data.