When i try to watch a video it says unsupported content type

youtube videos are mostly in mp4 formats, try converting the video to mp4 then upload it again, ubersoft is a very good video converter ,you can get it and many others from
http://torrentcrazy.com/s/ubisoft-video-converter-ultimate

i want valid certificate on my nokia 6303c

No usually installing the missing CODEC will resolve your problem, so go ahead follow instructions

unsupported scripts means that the file you are trying to open is not compatible with your phone. what type of attached files are you trying to open in your email by the way?

If your phone doesn't have Flash video format supported, youtube videos will not show. Most current generation Android/Windows Mobile/Nokia/Palm devices are capable showing youtube and other flash video sites on the phone's web browser. Others, like the iPhone will have specific apps that can display most Flash content.
On some devices you maybe able to install Flash Lite, which will enable you to view Flash video.

Without knowing details of your specific device/OS you have, this is as much help I can give you.

when I try to open youtube videos on my Samsung B5572 mobile it says unsupported format. Please help

The video most likely requires Flash or some other type of player that is not supported by your device.

unable to video in lg kp500, its say unsupported content

You can hard reset the phone (factory settings)

"power off - hold 3, green call and * - power on while holding"

Please note this will format all the saved information stored in phone memory.

As you may have heard, with the Xbox 360 Flash Fall 2006 System Update they are adding support for WMV video playback from new sources. Videos can be streamed from a PC running Windows Media Connect, Windows Media Player 11, or the new Zune client player, and can also be played from Optical Disc and most USB mass storage devices. For all these sources, only the WMV video file format and codecs are supported. How do I know if a video file will work on the Xbox 360? Currently only the Windows Media Video (WMV) file format and codecs are supported. If you have a file with a ?.wmv? extension, then the odds are pretty good that it will work. Technical details on the types of files we support can be found at the end of this post, but the easiest way to find out if a file will work or not is to just try it. Hopefully after you click play the video will show up on your display, but if the content is not supported you will simply get an ?Unplayable Content? message blade from the side of the screen and then be returned to the Video blade. How do I create videos that will play on my Xbox 360? Windows Movie Maker, a standard feature of Windows XPSP2, will output WMV video files compatible with the Xbox 360 console. Either use the default settings when you finish a movie and click ?Save to my computer,? or just make sure that the output video format you select shows the file type as ?Windows Media Video (WMV).? Videos will usually look best when they are closest to the original resolution that they were created with. Try to create video files at least 360 pixels high in vertical resolution in order to minimize content upscaling on the console. If you decide you want finer control of the output video file format, download a version of Windows Media Encoder (http://www.microsoft.com/windows/windowsmedia/) and then start encoding away. Optimal size and bitrate settings will vary depending on the source material you are encoding. As a general guideline though, 1.5 Mbps is a typical bitrate that should be suitable for most standard definition content, and 8 Mbps is a common bitrate for high definition content. Can I get more technical details about the kinds of files you support? WMV video files with the extension ?.wmv? are stored in a generic file container format known as ASF. ASF files can contain many different types of codecs within them. Xbox 360 supports most common WMV video codecs, as seen in the following chart: Supported Video Codecs: Name FourCC Windows Media Video 7 WMV1 Windows Media Video 8 WMV2 Windows Media Video 9 WMV3 Windows Media Video 9 Advanced Profile WVC1 There are some files with ?.wmv? extension that may play on a PC, but are unsupported on the Xbox 360 console. Windows Media Screen, Windows Media 9 Image (Photostory), and some older Microsoft codecs are unsupported, as seen in the following chart: Unsupported Codecs: Name FourCC Microsoft MPEG-4 Video Codec V3 MP43 Microsoft MPEG-4 Video Codec V2 MP42 Microsoft MPEG-4 Video Codec V1 MP41 Windows Media Screen V9 MSS2 Windows Media Screen V7 MSS1 Windows Media Video 9 Image WMVP Windows Media Video 9 Image v2 WVP2 ISO MPEG-4 Video V1 MP4S Anamorphic content with nonsquare pixels is currently unsupported on Xbox 360 console, and will be displayed as if the pixels were square. If you want to play such content on your console, it is recommended that you re-encode the content in a square pixel format.