How to capture screencast video and root not required?

I found a lot of solution to make a screencast on Android but each time the root is mandatory.

Does anyone have the solution without root?

Answer

If you're willing to use external hardware, one good option is an External HDMI capture card and a USB to HDMI cable.

For example a Blackmagic Design : UltraStudio Mini Recorder is only $145 for an HD-SDI and HDMI thunderbolt device, and a Micro USB to HDMI cable can go for as little as $10.

This way the recording does not affect the performance of your device or app. More expensive than an app on the device, but much more flexible.