Follow below steps to Play Video files in SharePoint 2010
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You can use the Media Web Part to play audio or video clips on a page.
You must have permission to edit pages to follow these steps.
Go to the page you want to update.
On the Page tab of the ribbon, click Edit.
Do one of the following:
If you are editing a wiki page or a publishing page, click an editable location on the page where you want to add the Media Web Part, click the Insert tab under Editing Tools on the ribbon, and then click Video and Audio.
If you are editing a Web Part page, click Add a Web Part in the column or zone you where you want to embed media. Under Categories, click Media and Content. Under Web Parts, click Media Web Part, and then click Add.
When the Media Web Part appears on the page, click the text that states Click here to configure.
Click the Media Options tab on the ribbon.
To configure the Media Web Part to display a specific audio or video file, point to Change Media, and then select one of the following:
To upload a file from your computer, click From Computer, browse to the location of the file you want, and then click OK.
To embed a video that is already saved to a SharePoint site, click From SharePoint, and then and then browse to a location on your site, such as an Assets Library, where video and audio files are saved. Select the file that you want, and then click OK.
To embed a video from a video-sharing website, click From Address, and then type the URL for the file you want to use, and then click OK.
The Media Web Part supports playing files from URL addresses that point directly to a video file. For example: http://mycompany/VideoFile.wmv. If you use embed code or sharing links for pages that host video, they will not work.
When you’ve selected the file you want, click OK.
In the Preview group, point to Change Image, and select the image file you would like to display as a preview for the audio or video file. If you do not update the preview image, the default image for the file type will be displayed.
In the Properties group, specify the title you want to display for the Web part. You can also specify whether you want the file to play automatically when the page is loaded, or if it should loop until stopped.
In the Player Styles group on the ribbon, point to Styles and select the style you prefer for the player.
In the Size group on the ribbon, you can optionally specify any changes you want to make to the Horizontal and Vertical size of the player.