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salam every one, this is a topic from google web master centrale blog: Webmaster Level: All

We'd like to highlight three best practices that address some of the most common problems found when crawling and indexing video content. These best practices include ensuring your video URLs are crawlable, stating what countries your videos may be played in, and that if your videos are removed, you clearly indicate this state to search engines.

• Best Practice 1: Verify your video URLs are crawlable: check your robots.txt
  
  • Sometimes publishers unknowingly include video URLs in their Sitemap that are robots.txt disallowed. Please make sure your robots.txt file isn't blocking any of the URLs specified in your Sitemap. This includes URLs for the:
    
    • Playpage
      
    • Content and player
      
    • Thumbnail
    More information about robots.txt.
    
  
  
• Best Practice 2: Tell us what countries the video may be played in
  
  • Is your video only available in some locales? The optional attribute “restriction” has recently been added (documentation at http://www.google.com/support/webmasters/bin/answer.py?answer=80472), which you can use to tell us whether the video can only be played in certain territories. Using this tag, you have the option of either including a list of all countries where it can be played, or just telling us the countries where it can't be played. If your videos can be played everywhere, then you don't need to include this.
    
  
  
• Best Practice 3: Indicate clearly when videos are removed -- protect the user experience
  
  • Sometimes publishers take videos down but don't signal to search engines that they've done so. This can result in the search engine's index not accurately reflecting content of the web. Then when users click on a search result, they're taken to a page either indicating that the video doesn't exist, or to a different video. Users find this experience dissatisfying. Although we have mechanisms to detect when search results are no longer available, we strongly encourage following community standards.
    
    To signal that a video has been removed,
    
    1. Return a 404 (Not found) HTTP response code, you can still return a helpful page to be displayed to your users. Check out these guidelines for creating useful 404 pages.
       
    2. Indicate expiration dates for each video listed in a Video Sitemap (use the <video:expiration_date> element) or mRSS feed (<dcterms:valid> tag) submitted to Google.

For more information on Google Videos please visit our Help Center, and to post questions and search answers check out our Help Forum.

Posted by Nelson Lee, Product Manager, Video Search this is a topic published in 2013... to get contents for your blog or your forum, just contact me at: devnasser@gmail.com

salam every one, this is a topic from google web master centrale blog: Posted by Aaron D'Souza, Software Engineer, Search Quality

Earlier this year, a bunch of Googlers (Maile, Peeyush, Dan, Adam and I) bunged ourselves across the equator and headed to Sydney, so we could show our users and webmasters that just because you're "down under" doesn't mean you're under our radar. We had a great time getting to know folks at our Sydney office, and an even greater time meeting and chatting with all the people attending Search Summit and Search Engine Room. What makes those 12-hour flights worthwhile is getting the chance to inform and be informed about the issues important to the webmaster community.

One of the questions we heard quite frequently: Should we as webmasters/SEOs/SEMs/users be worried about personalized search?

Our answer: a resounding NO! Personalized search takes each user's search behavior, and subtly tunes the search results to better match their interests over time. For a user, this means that even if you're a lone entomologist in a sea of sports fans, you'll always get the results most relevant to you for the query "cricket". For the webmaster, it allows niche markets that collide on the same search terms to disambiguate themselves based on individual user preferences, and this really presents a tremendous opportunity for visibility. Also, to put things in perspective, search engines have been moving towards some degree of personalization for years; for example, providing country/language specific results is already a form of personalization, just at a coarser granularity. Making it more fine-grained is the logical next step, and helps level the playing field for smaller niche websites which now have a chance to rank well for users that want their content the most.

Another question that popped up a lot: I'm moving my site from domain X to Y. How do I make sure all my hard-earned reputation carries over?

Here are the important bits to think about:

• For each page on domain X, have it 301-redirect to the corresponding page on Y. (How? Typically through .htaccess, but check with your hosting provider).
• You might want to stagger the move, and redirect sub-sections of your site over time. This gives you the chance to keep an eye on the effects, and also gives search engines' crawl/indexing pipelines time to cover the space of redirected URLs.
• http://www.google.com/webmasters is your friend. Keep an eye on it during the transition to make sure that the redirects are having the effect you want.
• Give it time. How quickly the transition is reflected in the results depends on how quickly we recrawl your site and see those redirects, which depends on a lot of factors including the current reputation of your site's pages.
• Don't forget to update your Sitemap. (You are using Sitemaps, aren't you?)
• If possible, don't substantially change the content of your pages at the same time you make the move. Otherwise, it will be difficult to tell if ranking changes are due to the change of content or incorrectly implemented redirects.

Before we sign off, we wanted to shout-out to a couple of the folks at the Sydney office: Lars (one of the original Google Maps guys) gets accolades from all of us jetlagged migrants for donating his awesome Italian espresso machine to the office. And Deepak, thanks for all your tips on what to see and do around Sydney.this is a topic published in 2013... to get contents for your blog or your forum, just contact me at: devnasser@gmail.com

salam every one, this is a topic from google web master centrale blog: this is a topic published in 2013... to get contents for your blog or your forum, just contact me at: devnasser@gmail.com