How to slowdown or speed up a video with mouse wheel

How to slow motion video or a speed up video very easily with mouse wheel ?

1. Upload your video file   
2. Hover the upload video icon 
3. Turn the mouse wheel 🖱 to reduce the speed from 1 until 0
4. Record your video     
5. Pause your video     
6. To  speed up the video playing hover the upload video icon again   
7. Turn the mouse wheel 🖱 to speed up the video from 1 until 5
8. Record  your video again   
9. Pause your video   
10. Download your video

Here is the video example with first a slow motion followed by a speed-up of the video