Trovata documentazione, documentato il tutto.

service.autoexec/addon.xml

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+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<addon id="service.autoexec" name="Autoexec Service" version="1.0.0" provider-name="syntaxerrormmm">
+	<requires>
+		<import addon="xbmc.python" version="3.0.0"/>
+	</requires>
+	<extension point="xbmc.service" library="autoexec.py">
+	</extension>
+	<extension point="xbmc.addon.metadata">
+		<summary lang="en_GB">Automatically run python code when Kodi starts.</summary>
+		<summary lang="it_IT">Esegui automaticamente del codice python quando Kodi si avvia.</summary>
+		<description lang="en_GB">The Autoexec Service will automatically be run on Kodi startup.</description>
+		<description lang="it_IT">Autoexec Service verrà eseguito automaticamente all'avvio del sistema Kodi.</description>
+		<platform>all</platform>
+		<license>MIT LICENSE</license>
+	</extension>
+</addon>

service.autoexec/movies.py

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+import sys
+import xbmc
+
+def RepeatVideo(file):
+	playlist = xbmc.PlayList(xbmc.PLAYLIST_VIDEO)
+	playlist.clear()
+	playlist.add(file)
+	xbmc.Player().play(playlist)
+	xbmc.executebuiltin("PlayerControl(RepeatOne)")
+
+def RepeatListVideos(a_tuple):
+  playlist = xbmc.PlayList(xbmc.PLAYLIST_VIDEO)
+  playlist.clear()
+  for video in a_tuple:
+    playlist.add(video)
+  xbmc.Player().play(playlist)
+  xbmc.executebuiltin("PlayerControl(RepeatAll)")
+
+# Eseguo un solo file in loop
+#RepeatVideo("/home/osmc/Movies/presentazione_NS.avi")
+
+# Definisco una playlist come una tupla
+playlist = (
+    "/home/osmc/Movies/presentazione_NS.avi",
+    "/home/osmc/Movies/#diciotto-1080.mp4"
+)
+
+# Ripeto una lista di video
+RepeatListVideos(playlist)

service.autoexec/slideshow.py

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+import xbmc
+
+path = "PathToYourMedia"
+xbmc.executebuiltin(f'RecursiveSlideShow({path})')