Youtube video player keeps flashing to small screen to big screen.

Go to www.google.com and in the search box type: "download flash player" (without the quotes). Look for the adobe site where it says "Get Flash Player" and the site is: get.adobe.com/flashplayer Download and install in.

When it finishes go to google.com again and this time in the search box type: "download shockwave" (without the quotes). Download Adobe Shock Wave Player from the site get.adobe.com/shockwave

When it finishes close your browser then open mozilla again and when it comes up go to site www.youtube.com If it tells you to do a flash plugin now, just click the link to download and install it.

I'm curious what version of Firefox are you using? In your Firefox browser click HELP at the top then select About Firefox. It will tell you the version you are on. If you're not on version 11, download in install Firefox. It will automatically upgrade your current version without losing any of your settings, bookmarks, etc.

Update of Flash player can help. If you use IExplorer, you can try with Mozilla Firefox browser, because flash plugin is little different in coding. If you can not see in real time video, you can download from YouTube to computer and than you can play (I suggest VLC player). You can download with installing DownloadHelper plugin in Firefox. It will add icon with rotating points with some arrow. You just click on arrow and you have list of videos for downloading. FLV is for flash, and MPG for MPEG video coding (the same video is in different quality). Sometimes your problem can be with directx. Try to update it too.

Well Sunkengarden, the videos you are watching on YouTube or any such websites are the Flash Player Applications. That means, the Browser on which you are trying watch the videos, needs Flash Player Application to be installed on your computer. Such traditionally most widely used flash players are Adobe Flash Player and Microsoft Silverlight.
While you are using Google Chrome, there is no problem just because of Google Chrome already have in-built flash player within it. But the problem remains for IE or other Browsers.
Different Web-Browsers use different types of Adobe Flash Players (IE type or Non-IE type). So, for best results, I recommend you to install both the IE and Non-IE Adobe Flash Players on your computer to have all the browsers play the videos without any problem.
Download the Flash Players by clicking on the following links:

• Adobe Flash Player for IE (IE, Avant,etc)
• Adobe Flash Player for Non-IE (Mozilla, Mozilla Firefox and other Geeko based browsers)

Hope this helps,
Regards, Mrityunjay.

I think this could a problem of the backdated flash player or backdated web-browser. Try to have the latest flash players and updated browsers. Get the latest flash players and browsers by clicking on the links below:

• Flash Player for IE ( for IE, Avant, etc.)
  
• Flash Player for Non-IE (for Mozilla Firefox, Google Chrome, Opera, etc.)
  
• Mozilla Firefox 4 RC
  
• Google Chrome 12 Beta

Try using one the Browsers and install both the flash players for best results.

Hope this helps,
Regards,

Mrityunjay

What is the browser you are using? Did you try firefox browser? internet explorer is a nightmare when it comes to displaying flash content.
Try this
http://www.mozilla.com/en-US/firefox/3.6.14/whatsnew/
And the download flash player(plugins are seperate for IE and firefox)
http://get.adobe.com/flashplayer/

Make sure you have flash installed on the computer and that it is the most recent version. TO download flash go to http://get.adobe.com/flashplayer/

1.Watch videos at off peak times, if possible 2.Do not run other programs while watching videos. They slow down computer ingeneral by making use of memory. 3.Add RAM on your computer. More RAM will make easy execution of heavy programson your system. 4.Get better and speedy internet connection. Talk to your ISP in this regard. 5.Regularly clean windows registry. Windows registry is vital place that storesinformation for important computing functions. A congested or corrupted windowsregistry makes computer slow that causes YouTube like freezes. For this, getthe best registry cleaner RegInOut cleaner and optimizer. Use it once in afortnight for fast computing to avoid YouTube freezes and system slow down.

Is your flash player up to date? Because you have to install different flash-players for i.e. IE and Firefox, please go to your system's settings an deinstall the current flash player.

Afterwards download the installation package from http://get.adobe.com/de/flashplayer/ and try it again.

Does Youtube tell you that you need Flash Player or give you some kind of other error? What browser are you using? Internet Explorer or something else?
I would just go to adobe.com and click on the Flash Player logo and download it again. Make sure it installs successfully. Then go to Youtube and test.

Hope this helps! If so please leave a rating!

• Yes, I would recommend that you download and install Firefox

• Then, get the Flash plug-in HERE. (while using Firefox as your browser).
• Follow the instructions for installing the add-on in Firefox, Then Restart Firefox.
• Try your you-tube video watching now!

I Hope this Helps.