The following video is showing the group leaving the Gollan Hotel at the crucial evening. It reflects some strinking circumstances IMO. I recommend to use a slo-mo, if not even picture to picture view, not to miss any small detail!
At first, let's try to fathom the "who is who and what is he doing" IMO:
1st second: KS either saying goodbye or even apologizing to the bartender who is said to have thrown them out. TM looking towards the hotel, Simone looks as if she had a kind of argue with JM, pointing her finger at him (hard to see, due to a very short sequence). JM doesn't even look at Simone at the time, although she seems to have a conversation with him.
3rd second: TM struggling with his stamina with his back towards Simone, obviously according to some kind of intoxication. Simone looks at him. JM starts to look back at Simone right now. KS either looks to the ground, or at JM.
4th second: JM trying to prevent TM from falling to the ground, although i would like to see a much more corpulent person than the JM shown in the recent reports. But who knows.
5th second: JM grabbing TM, moving him away into direction to the nearby street. KS following them. Simone stays in front of the hotel, pointing her finger to JM again (another very short sequence).
9th second: Now two groups IMO. Simone on the left and the other group almost splitted off to the right. Starting to walk away while Simone stays in front of the hotel. She looks like if she is doing something with her right foot. Probably destroying a cigarrette butt or something else. JM and TM heading towards the street, KS following in a one or two step distance, hands in her pants.
12th to 14th second: TM turnig around towards Simone and qickly turns back around towards the street. Keeps moving to that direction, togehter with JM. KS looking to the left, probably looking for a passing car. Simone looks and talks directly to KS, in some kind of tense posture.
15th second: Simone pointing her finger either towards the whole group or just KS again.
17th - 18th second: KS must have made some kind of reaction to that, because Simones posture changes, her arms and shoulders seem to be more relaxed, but in some way it looks as if she would build herself up against KS. Simone points her finger again at KS in some kind of furious way. Obviously a girl to girl fight with arguments.
19th - 23rd second: Simone keeps on arguing with KS.
24th - 28th second: TM heading towars Simone, taking her by the hand and even keeps distance. It looks, as if he tries to comfort or calm her down her in some way. In the other way, JM and KS seem to approach Simone a little bit more "progressive" IMO.
29th second: KS entering the "comfort zone" between TM and Simone with her arms raised and her hand on her head in a kind of offensive way. JM looking directly towards Simone. TM keeps on holding Simones hand until the video stops.
So to me and my point of view, this video shows just three of four people from the group having an argument or showing kind of "progressive" behavior. Mostly Simone and KS. TM looks very drunk or wasted in another way, but it looks like if he tried to comfort her in a situation, she had arguments with KS and probably JM.
TM was hardly able to walk without stumbling, if not being supported by JM. To me it looks, as if he even seems to have tried to defuse the situation. I know TM's condition shown in the video very well. Hard to fathom, that he would be able to commit the almost perfect crime some minutes or hours later. Or to remember anything from that evening correctly.
But i would like to see a heated confrontation between Simone and the german visitors, one of them being a close family member of TM. But the whole sequence seems to be too short, to be able to evaluate the situation finally at last.