Add a README

README.md

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+# bora.sh
+
+A simple shell script to theorize downloading specific lecture videos from a Moodle/BigBlueButton instance.
+
+## Installation
+
+You'll need to install `wget` and `ffmpeg`. Your favorite package manager should do the trick.
+
+## Usage
+
+Run with:
+
+```sh
+./bora.sh <URL> <output>
+```
+
+The output will default to `out.mp4` but may be any file type that FFmpeg supports.
+
+The downloads will be cached in a local `tmp` directory and are continued in case the connection fails.
+
+If no URL is given, the files are assumed to be called `webcams.webm` and `deskshare.webm`.