Update README.md

README.md

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 The code can be readily run on neural temporal fluorescence calcium imaging data. Please have a look at the [demo](https://github.com/j-friedrich/OASIS/blob/master/examples/Demo.ipynb).
 
+<p align="left"><img src="https://github.com/j-friedrich/OASIS/blob/master/examples/oasis_video.gif"  width="90%"></p>
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 ## Requirements
 The scripts were tested on Linux and MacOS (some users successfully used Windows too) with a typical numerical/scientific Python 2.7 or 3.5-3.11 installation that included the following