Okay, nevermind. After 1 day of frustration I finally found the solution right after posting this topic here.
Adding the followiing after the vimeo url finally solved the issue.
&muted=1
Autoplay videos can't have sound, which makes sense. The thing is i that i deleted the audio track of the videos for that reason, but even tho the video didn't have an audio track this control tag is still necessary for it to autoplay in chromium browsers.