I’ve got this question in my email last day. Since it’s something that many people ask, I say:
Why not to see how Google does on their own sites, for example YouTube ?
Many people adds a lot of irrelevant META’s that add nothing to the page (OH yeah: They add bytes, making it load slower)
So here we go with this example, showing that only 3 METAS are relevant. The page in question is a YouTube video of the Argentinian president. Now look how Google codes the META’s:
<meta name="title" content="Cristina presidenta"> <meta name="description" content="http://comparasuper.com Con todo respeto: Que hija de **** hehh! Prestar atención a los gritos de los negros del fondo. Cada que vez que veo algo asi estoy m..."> <meta name="keywords" content="presidenta, argentina, 2007, president, cristina, kirschner">
Only 3. RELEVANT. To the point, no need more.
TITLE: Your video title
DESCRIPTION: Your video description (Only first 180 characters or so, no need for more)
AND KEYWORDS: Guess what ? The TAGS you use for the videos, no better keywords than that.