user15864: For example how to turn 1:03 video into 1:00 without cutting anything. Can I do it on any mobile video editor? 

user6207: This is generally done by retiming the video. Usually, if you're retiming by anything other than double or half, you need to use a professional application such as Final Cut Pro X or Premiere. They will have options for doing the speeding up in a number of different ways such as "Frame Blending" or using "Optical Flow". 
For mobile, a quick search with these terms "app to speed up video iPhone" shows a number of results.

15864: <p>For example how to turn 1:03 video into 1:00 without cutting anything. Can I do it on any mobile video editor? </p>
 6207: <p>This is generally done by retiming the video. Usually, if you're retiming by anything other than double or half, you need to use a professional application such as Final Cut Pro X or Premiere. They will have options for doing the speeding up in a number of different ways such as "Frame Blending" or using "Optical Flow". </p>

<p>For mobile, a quick search with these terms <a href="https://duckduckgo.com/?q=app+to+speed+up+video+iphone&amp;t=osx&amp;ia=web" rel="nofollow">"app to speed up video iPhone"</a> shows a number of results.</p>
