Effortless methods to enjoy video content on your Windows computer
To play an MP4 file on your PC, you'll need a compatible media player. If you're using Windows Media Player version 12, it can handle MP4 videos seamlessly. However, for versions 11 or below, you may need to install a codec or utilize a third-party media player like VLC or QuickTime.
Steps to Follow
Using Default Media Players

Get the video. Download your MP4 file from a trusted source, retrieve it from a USB drive, or simply access it from your computer's hard drive. Ensure you know the file name and its location. Click on 'File,' then 'Open,' and select the MP4 file from your File Browser.

Give it a double click. Once you've located the video on your Operating System (OS), double-click its icon to initiate playback of the MP4 file. If you double-left-click the video, your default media player will launch and start playing the video.
- The video will typically open with Windows Media Player, which is included in all PCs running any version of Windows. However, versions 11 and below may require a codec or third-party decoder to open MP4 files.

Install a codec or decoder pack. Install the DirectShow-compatible MPEG-4 decoder packs recommended by Microsoft. Alternatively, you can download codecs from http://www.microsoft.com/windows/windowsmedia/forpros/format/codecdownload.aspx.

Give the video's icon a right-click. If you're using the Windows OS, instead of double-clicking the MP4 file, you can right-click it to select the media player you want to use for playback. This action will bring up a drop-down menu.

Choose 'Open With.' Upon selecting this option from the drop-down menu, a new cascade window will appear, listing various video players available. This list typically includes 'Windows Media Player' and any other third-party media players installed.

Opt for Windows Media Player. If you've installed a codec or decoder pack, your preferred MP4 video will open in Windows.
Acquiring Third-Party Media Players

Download a media player from a reliable source. Opting for a different video player can often prove more beneficial or convenient than installing a codec or decoder pack. Well-known third-party media players include VLC or XBMC. Ensure you know the download location of your chosen media player.
- It's advisable to utilize the pre-installed media playback software bundled with your operating system; however, as they come free with your OS, they may not fully support all file formats.
- Both free and paid software options are available. Some free software like VLC Media Player, Media Player Classic, etc., are among the best and most widely used. They offer playback support for nearly all video and audio file formats.

Access 'Properties.' Modify your default media player by accessing “Properties.' Navigate to the “General” tab, then select “Change,” and choose your preferred media player before clicking “OK.'

Right-click to select your media player. If you're using the Windows OS, instead of double-clicking the MP4 file, you can right-click it to choose your third-party media player. This action will prompt a drop-down menu to appear.

Choose 'Open With.' Upon selecting this option from the drop-down menu, a new cascade window will emerge, presenting a list of video players, including the installed third-party media player. Click on your desired media player, and your MP4 file will open accordingly.

Utilize editing software for MP4 playback. Advanced users may opt for editing software such as Camtasia to manipulate video or audio. Professional DJs can employ auto-play software like Virtual DJ Pro to queue multiple videos for sequential playback.
Helpful Advice
-
Ensure the file has the .mp4 extension.
-
For Mac users, the default player is QuickTime Player. Alternatively, VLC Player for OS X can be downloaded on your Mac.
-
Opt for media players that reduce CPU workload, allowing it to focus solely on video playback.
Warnings to Consider
- Windows Media Player does not support the .mp4 format by default.
- Installing third-party media players is not endorsed and can pose risks to your computer. Some may contain spyware and malware.