after days with try and error, try and error I have finally find the real problem and a solution:
Special feature of Safari
Videos under Safari can cause problems when playing. For example, the first video to be played must not be faded in/displayed "softly" in the programming.
So here it is faded in without animation. Once a video has been faded in "hard", the soft fade-in will work for all other videos. Nevertheless, it is best to avoid soft fade-in (or animation when fading in) completely.
The same applies to all elements that are in the programming sequence before the video in the start command. No animations during the actions !!!
With the other browsers this function works from the beginning. Also all further programming with videos for Safari (also direct commands on the video like stop, go to, ...) should be used with caution.
Attention: All these functions work in the offline preview of PubCoder in all browsers, also in Safari and it is assumed that it works online as well.
Another problem: Online the functions on the video often work only once. Example: Command on video: "Hide Video/Object". The video will be faded out, but you cannot reactivate it with the start command, you have to reload the whole page and thus the video.
Can I just reload only the video so that it can be played again?
The problem with Safari was not easy to find, especially because it worked in the preview. So you get very confused at some point because you get confused with the functions and try and error.
This makes you especially nervous when the job has a deadline.
Angelo, you give good tips, thank you for that. Sometimes you answer only after days. Is there a faster way to get help? When I reported it as a bug, none came up at all.
I uploaded the file. I have solved the video problem. Maybe you can help me with the problem with the touch of the start button (mouse over to highlight)?
BTW: PubCoder is a great software !