How to make the player show the first frame of the video?

Question

PHP

How to make the player show the first frame of the video?
Now js does it for me:
'events': {onReady: function () { this.play(); this.pause();} The
disadvantage of this implementation is that all videos on the page start loading at the same time!
The customer does not want to separately cut a frame for videos, because. There are a lot of them and they change often.
The site is implemented in php, modx, jwplayer.
There was an idea to connect to ffmpeg so that it crops the first frame. However, how does ffmpeg "know" about a new video? And how is youtube implemented?

Answer 1

All players support image insertion. Put the picture on the player.