Video File Support Information


NOTE: Videos need to be .MP4 using H.264 encoding and AAC/MP3 audio codecs. The following video file types will be converted - .webm, .avi, .mov, .mpg, and .wmv to the MP4/H.264. Videos with a resolution greater than 720p will be forced down to 720p. Audio codec is converted to AAC if not already in that format. Video will be transposed based on detection (this is useful if taken on a phone and the orientation was wrong as it is also forced into a linearized format so that streaming works properly). 

The use of .MP4/H.264 w/AAC was selected as it has the widest audience coverage based on device and browser types most popularly used. If you get an error message, the video does not meet these requirements.

  • 640 x 360 Low Quality - This is the 1/4 size of the 720p HD TV standard.
  • 960 x 540 Medium Quality - This is the 1/4 size of the the 1080p HD TV standard.
  • 1280 x 720 High Quality - HD TV standard and is popular in phones.
  • Quarter sizes use less  bandwidth and will look better on the full 4/4 versions of those screens.
  • For best quality, encoding to 1024 kbps (or lower) on .MP4 files.

When loading a large file the screen will make the current window inactive.  You can minimize that window while the file uploads and perform other tasks.  When a file is uploaded and is going through a Conversion, the Video Asset will be locked (Save is Disabled). When the Conversion completes, the Video Asset will unlock for further editing. The maximum file size for upload is 250MB.

NOTE:  Video Assets that are .flv format, are no longer supported.  These types of Video Assets will now present a simple download link instead of an inline player.  HTML5 is supported in BLOX CMS. 

NOTE: The BLOX Video Player supports Video Ads that Pre-roll and Mid-roll. Mid-roll, however, applies to DFP ads only.

NOTE:  A still image of the first frame of the video is created when the video is uploaded but that can be changed by playing the video and pausing it at the desired spot and clicking the Capture Current Frame button. Clicking the Capture Current Frame button will give you a dropdown to set either the Poster or the Preview Image.

Video Players

  • Both Flex and Zen Template Video Players - The 'flowplayer mode functionality' has been replaced with 'videojs.ima mode functionality'. This technology is supported in BLOX CMS. BLOX Ads are supported and tracked and are available in Google Analytics as well.

How To Create:


Note:  Third Party Video URL's (videos hosted elsewhere), the URL for the Video can be used to create a Video URL Asset in BLOX CMS.


From the dropdown in the the upper left choose Editorial / Assets (Not sure how to access BLOX Applications? Click here).  

Select More / Video.

The Video: (New) window appears.  Type in the name of the video in the Title field (required).

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Under Video, select New and click on Enter Video URL.

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 The Video URL dialogue window opens.  Enter the URL for the Video.  This must be the actual .MP4 video URL, not a video link or a YouTube Video link (see YouTube asset documentation to create a YouTube video Asset).

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 A Poster and Previews are auto-populated from the video selected.  Author(s)Byline and Description can be added as desired. You can use Capture Current Frame to set a new Poster or Preview.

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  If the Video asset is going to be attached to an article, this step can be skipped.  If the video is going to stand alone on the front end, a Section tag is required.  To the right of the main Video: (New) window are three areas; TagsRelated, and Other.  From Sections under Tags, select Add.

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This brings up the Select Sections screen from which you can choose the section(s) of the publication to which you want the asset assigned.  Holding the CTRL key while clicking will allow the selection of multiple sections. When you are satisfied with the sections chosen, select Add Sections.

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  From the bottom of the screen, click Save and Close.

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