Extract the thumbnail and images from a Youtube Video
This tool can extract thumbnail and images from a Youtube video. Just enter the URL and ur tool does the rest.
Find and analyze the tags used by some Youtubeur will improve the ones you use. You must optimize your tags to improve the position for your video in search results (SEO) both of Youtube, but also on Google and other search engines
Feel free to compare the use of tags on videos that talk about the same subject as yours. Suitable tags may enable you to attract traffic from other Youtubeur doing the same kind of videos.