remove videos from documentation

pages/docs/use_cases.md

@@ -7,11 +7,7 @@ One model was used to ensure a low speed of the robot when within a safety zone
 
 ![Screenshot of Gazebo](img/robo3d.png)
 
-[📽 Recording of the simulated robot during the use case](img/moving-robot.mp4)
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-This paper was presented on October, 16h during the [MPM4CPS workshop](https://msdl.uantwerpen.be/conferences/MPM4CPS/2020/) within the [MODELS 2020 conference](https://conf.researchr.org/home/models-2020). For more information, see the [presented slides](img/mpm4cps-slides.pdf) or the [a recording of the session](https://youtu.be/Hgc1qFfmr44?t=1220).
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-There is also a [poster](img/poster.pdf) and a [pre-recorded presentation](img/poster-presentation.mp4) of this poster.
+This paper was presented on October, 16h during the [MPM4CPS workshop](https://msdl.uantwerpen.be/conferences/MPM4CPS/2020/) within the [MODELS 2020 conference](https://conf.researchr.org/home/models-2020). For more information, see the [presented slides](img/mpm4cps-slides.pdf), [a recording of the session](https://youtu.be/Hgc1qFfmr44?t=1220) or the accompanied [poster](img/poster.pdf).
 
 The repository with the used source code can be found at: <https://git-st.inf.tu-dresden.de/ceti/ros/mpm4cps2020>
 The usage is dockerized, so starting the application only involves the commands listed below.