diff --git a/.gitattributes b/.gitattributes
index caa3f0309..9dfeb5c4e 100644
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+++ b/.gitattributes
@@ -13,3 +13,4 @@ jpg filter=lfs diff=lfs merge=lfs -text
 *.mp4 filter=lfs diff=lfs merge=lfs -text
 *.x_t filter=lfs diff=lfs merge=lfs -text
 *.exe filter=lfs diff=lfs merge=lfs -text
+*.mkv filter=lfs diff=lfs merge=lfs -text
diff --git a/extrusion/docs/notes.md b/extrusion/docs/notes.md
new file mode 100644
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+++ b/extrusion/docs/notes.md
@@ -0,0 +1,8 @@
+
+## Food
+
+- https://www.youtube.com/watch?app=desktop&v=Id2qcMTmS4A&ab_channel=INDAGMaschinenbauGmbH
+
+## Ring Mixer
+
+- https://www.loedige.de/en/machines/continuous-ring-layer-mixer-corimix/