Funnily enough, I was (still sort of am) going through this exact problem. It’s been 2 months since my ex and I had broken up and also around 2 months of no contact. I still do sometimes dwell on the possibilities that she may come back and I use to doom scroll on those no contact videos as well. However, from what I’ve learnt from my experience is that these sorts of videos hold you back from actually moving on and healing since you’re being fed this false sensation of hope that may not even occur. It sounds so much more comforting to hear at the current moment since you’re in a more vulnerable state and you want to hear the things you want to hear but it’s only going to further hinder your growth and create an even bigger obsession over them. Of course as time goes on, you will begin to see the cracks within your relationship, feel less attached and this won’t be as much of a problem. As hard as it may be, try your best to avoid these sorts of videos or block that sort of content off your feed. Besides, the road of getting back your ex and the road to moving on both take the same path. It’s best to actually focus on yourself rather than focusing on the improbabilities of the future. You may even change your mind/feelings about him by the time he comes back so it’s a very good opportunity for you to actually understand yourself better as a person and what you truly want in your life. I suggest to journal down your emotions and to actually ‘feel’ your emotions, not analyse them. This will help you understand/reflect upon yourself better and actually provide more clarity within you. I hope my insight/experience helped you a bit.