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When it comes to targeting mobile phones or devices with mobile data connections, Adaptive Streaming is really important. This is a technology that allows this video stream to adapt based on the connection speed. For example, if I were to watch this video on my 3G phone, it's going to be a different video quality than watching the same video over here on my iPad, which happens to be connected to a WiFi connection. If I were to go off my WiFi connection and switch to 3G data on this iPad, the quality would drop down.
So what really happens here is different speeds. Notice that this video took a little longer to play on the phone, because it had to adapt to the network speed, it's serving up a lower quality file than the one that started playing on the WiFi device. Same player going to my computer would serve up an even higher bit rate version, and that's all about the speed of the network connection. The good news is, is that when you pick a service that supports adaptive streaming, which things like YouTube and Vimeo do, your service will automatically serve up the right video based on the network connection speed.
This means, you only need to upload one HD video file and then what will happen is that file will get recompressed and optimized for different connection speeds by the service itself. So, if you go ahead and pick a service like Vimeo or YouTube, it's going to take advantage of adaptive streaming for you. This is critical if you want to target smartphones or other devices using 3G or even 4G network connection options.
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