I've found most of the video's the Bold Red below is the actual length of the vid. It seems most were not watched fully so IMO must have been someone 'skipping through' youtube at the time and not necessarily autoplay IMO.
Here are the timings for the early hours of July 31, when Cole and the youth defendant removed Logan’s body from the property.
12.20am: Williamson accesses the Samsung One Home app
12.25: Williamson accesses Facebook app
12.29am: Williamson watches YouTube video
12.36am: Logan’s bedroom light comes on
12.38am: Light goes off
12.41am: Logan’s bedroom light comes on
12.42am: Light goes off
12.46am: Williamson accesses YouTube
12.51am: Williamson watches YouTube video entitled “Spoon is used to remove man’s cyst… Dr Pimple Popper”
This video is 9.56 minutes long.
12.52.am: Williamson accesses app management notification
1.10am: Williamson accesses Facebook
1.17am: Williamson watches a series of YouTube videos entitled “Large black head abstraction” (Couldn't find this one), “You have never seen ice cream cake made like this” (shorts about 1m long)
1.19am: Williamson watches YouTube video “Professional make-up artist, how to look beautiful”. (Couldn't ID this video)
1.20am: Williamson watches YouTube videos “Not your average BMW E38” and “Viral shorts” (Viral short 10 seconds)
1.21am: Logan’s bedroom light comes on and off
1.22am: Williamson accesses Samsung One Home app
1.23am: Williamson accesses YouTube
1.24am: Williamson watches YouTube video “Conjoined sister born as one now thriving as two” (5.43 minutes long)
1.29am: Williamson watches YouTube video “My twin is only four foot three, born different” (7.02 minutes long)
1.31am: Williamson watches YouTube video “German lady wants a nose job to look African” (6.54 minutes long)
1.40am: Williamson watches YouTube video “Three friends Simon wrong in powerful operatic” (7.09 minutes long) and a “Dr Pimple Popper” video
1.41am: Williams watches YouTube video “The cutting and removal and cleaning big long toe nail and various other videos. (couldn't ID)
1.49am: Light comes on in Logan’s bedroom
1.50am: Light goes off in Logan’s bedroom
2.08am: Light comes on in Logan’s bedroom
2.10am: Light goes off
2.14am: Williamson accesses YouTube.
2.20am: Light comes on in Logan’s bedroom
2.21am: Light goes off
2.22am: Light comes on in Logan’s bedroom
2.24am: Williamson accesses Samsung One Home app
2.26am: Access Samsung Android dialler app
If it was the youth was watching the make-up vid it could have been to pash on a female model?