Why can't I play videos sometimes on my Huawei Honor 4C?

Some times i cant play the videos in my phone showing "cant play this video" how to fix it?

My honor 4c cant play any video whats the problem how can i clear this problem

How I can use MX player link? No social video is working on my phone 

This may depend on the video format. Try using MX Player (link), never had problems playing videos with it.

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