If you are using Google Translate or similar, it is not working particularly well as what you've just posted is almost gobbledygook. As requested by walter-i. you can also post in your home language so that browser language translators can translate into English, German or other.
Please note that the video that you originally posted does not explain the problem very well as all it shows is both the video and audio looping - but not due to the looping markers which are placed much wider.
We cannot be served with another video to help you. Better to let us download a smal part of that used file plus you project veg without further content. Place it on a site as dropbox, or another site to share files, so we can download the file and your projectfile to try out on our hardware to see what maybe is wrong.