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hmm well did not see that ...
no its not necessarily about compressing, but transcoding the Video with Handbrake, an open source tool that is able to use a lot of different codecs and therefore can produce Videos running on a lot of different Hardware Setups.
@manishmike10
i did not see the other tutorial about this tool, but even though this does not make mine wrong does it ?

But your tutorial is focused towards compressing the video. Also there are other tutorial about the transcoding.

well, as far as i understood there is no rule that a tutorial can only be about the whole Software, or why are we seeing thousands of wordpress tutorials out there ?
so if iam violating any rule please tell me, i looked them all up before i wrote this ...

Each wordpress contributions are different. If they are the same, they are rejected.
We also don't accept same tutorial but in other language either.