Recorded half of my video sideways S4?

I was recording an important video using my Galaxy S4. I turned the phone sideways to capture more aI was recording an important video using my Galaxy S4. I turned the phone sideways to capture more and now when viewing - half of this video is sideways =( Wondering if there is a chance I can only edit half of the video to rotate. Any help would be appreciated.

Also, the second video is completely sideways. Nd now when viewing - half of this video is sideways =( Wondering if there is a chance I can only edit half of the video to rotate. Any help would be appreciated.

Also, the second video is completely sideways.

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