Glitch at the start of videos

[JeanLuc]

Hi,

I'm trying to make a video start immediately and fade in when it has already started.

The problem is, it shows a keyframe of the video of somewhere in the middle first while fading in and only then starts playing.
I would like it to play and fade in at the same time.
I've tried this in multiple ways:
- a fade in all transition on the slide and on the video start play after & with previous
- no animation on the slide, start play after & with previous, then fade in on the video

I've also tried it with an object, a big solid rectangle filled with background color:
- first start video, then with a delay, fade out the rectangle after previous
...

Is there a workaround for this?

Thanks in advance for the help!