Change initial frame image of a video before it is played

Hi all,
I have a video inserted via "Insert Media" function on Rich Content Editor, in a Matrix Table question. The video is a Mp4 file uploaded to my library. I need to change the initial frame shown before the video it is played.
Is it possible to implement one of these two solutions:

1. Select a specific second (e.g., sec 5) of the video and set this as the frame of the initial screen, before the video is played.


2. Ensure the video shows a black (or any other color) image before it is played.

I get close to solution 2 by changing, in Rich Content Editor of the video, preload="auto" to preload="none". However, the initial box is smaller compared to the size of the video.
Thank you.