Almost every day we watch videos online or offline. From movies to YouTube clips, video players make it easy to play. But how exactly do they work, and what makes a video player better than others? Let’s break it down in simple terms and help you find the right video player for your needs.
How Do Video Players Work?
When you watch a video, there are a lot of things happening behind the scenes to make it look and sound right. The main tool for video players is called a codec. A codec is a bit like a “translator” that makes video and audio files easier to store, share, and play. Let’s know how it works.
What is a Codec?
Codec stands for compressor-decompressor. Because video files can be huge, codecs make them smaller by compressing the data. In this case, this saves storage space and makes videos easier to stream or download. When you play a video, the codec decompresses it so you can watch it smoothly on your screen.
There are different types of codecs for video and audio. Each codec is like a specific tool for certain file types, that helps the video player understand and play the videos.
How Codecs Work with Video Formats
Every video file has a format, like MP4, MKV, AVI, or MOV. Inside each file format, there’s usually a codec for video and a separate codec for audio. Here’s how it works with some common formats:
MP4 files
Mp4 uses a codec called H.264 for video compression. H.264 is very popular because it keeps videos looking clear and detailed while keeping file sizes small. This makes MP4 files a great choice for streaming on YouTube and other platforms.
MKV files
MKV is a flexible format because it can hold many different audio, video, and subtitle tracks in one file. For example, an MKV file might use H.264 for video and MP3 for audio, or it could use completely different codecs. For this flexibility, some high-quality movies or complex videos use MKV. But not all players can handle every codec found in MKV files, so you might need a specific player, like VLC, to play them without issues.
How Does a Video Player Use Codecs?
When you open a video file, the video player looks for the codecs needed to decode (or read) both the video and audio tracks. It then plays them together to make sure they are in sync so you see and hear everything at the right time.
Some players come with built-in codecs for almost all formats. So you don’t need to install anything extra. Others might require you to add codecs to play certain formats.
In short, codecs make video files work on different players, and the player itself synchronizes both the video and audio, ensuring smooth playback.
Top 5 Video Players in this era
There are several video players you can use, each of them have unique features. Here are some of the most popular ones:
VLC Media Player

VLC is one of the most versatile video players out there. It’s free, works on nearly any device, and can play just about any file format you throw at it without needing extra codecs.
Features of VLC Media Player:
- Plays MP4, MKV, AVI, and more
- Syncs subtitles, lets you adjust them, and can even stream online content
- Highly customizable
KMPlayer
Known for supporting high-definition video like 4K and 8K, KMPlayer is packed with features and a user-friendly interface.

Features of KMPlayer:
- Plays high-quality formats (4K, UHD, 8K)
- Supports 3D and VR video
- Customizable with built-in codecs
PotPlayer

PotPlayer is a lightweight option for Windows users, known for fast, smooth playback and extensive customization options.
Features of PotPlayer:
- Plays a wide range of formats (MP4, MKV, AVI)
- Hardware acceleration for smoother playback
- Supports 3D videos
Windows Media Player
For Windows users, this is a simple, reliable player that handles common formats and is easy to use.

Features Windows Media Player:
- Plays standard formats like MP4 and WMV
- Comes pre-installed on Windows devices
- Simple, straightforward interface
QuickTime Player

If you are a Mac user, then this is for you. QuickTime offers smooth playback with a clean design. The video playback experience is top-notch.
Features of QuickTime Player:
- Plays MOV and MP4 formats
- Built for macOS, so it integrates perfectly
- Lightweight and easy to use
Streaming Video Players
With streaming on the rise, some video players now let you play videos directly from the internet. Apps like VLC let you stream from URLs or local networks that allow you to watch live streams or online videos without downloading them.
How to Choose the Right Video Player
When choosing a video player, here are some key things to consider:
1) Format Support: Make sure the player supports the file formats you use most. If you watch videos in different formats like MKV or FLV, choose a player like VLC or KMPlayer that handles various formats with ease.
2) Performance: Watching high-definition or 4K videos? Go for a player with hardware acceleration (like PotPlayer or KMPlayer) for smoother playback.
3) User Interface: Want something simple? Choose QuickTime or Windows Media Player. Prefer more control? VLC and PotPlayer let you tweak settings for a customized experience.
4) Subtitles: Handy for watching foreign films or adjusting sync if needed.
5) Streaming: If you watch live streams or online content, consider a player with streaming support.
6) Customization: For power users, customization options (like skins and advanced controls) are a plus.
Tips for Better Video Playback
1) Update Regularly: Keeping your player and codecs up-to-date helps avoid issues with new video formats.
2) Use Hardware Acceleration: This option, available in many players, improves performance, especially for HD videos.
3) Sync Subtitles: Many players have subtitle syncing features, which are great for foreign films or correcting subtitle delays.
Conclusion
Choosing the right video player makes a big difference in your viewing experience. Whether you want various features, including a player like VLC, a lightweight one like PotPlayer, or a simple one like Windows Media Player, there’s something for everyone. Just remember to pick the one that best fits your needs, so you can enjoy your videos—no hassle, just hit play.

প্রতিবন্ধী বিডি একটি সেবামূলক ওয়েবসাইট যেখানে বাংলাদেশের প্রতিবন্ধী শ্রেনীর নাগরিকদের প্রদানকৃত ভাতা ও অন্যান্য সেবা সমূহ নিয়ে তথ্য প্রদান করে থাকে। এছাড়াও সরকার দ্বারা প্রদানকৃত অন্যান্য ভাতা ও সুযোগ সুবিধা নিয়েও জানানো হয়ে থাকে। তবে এটা কোনো সরকারি ওয়েবসাইট নয়।