Just my thoughts.
I wonder if it is a part of a biggger trend.
If depression anxiety can be considered as the condition of involuntarily paying prolonged attention to past regrets/glories or future fears/hope; or the inability to choose the present moment as the object of ones attention;
then YouTube, social media or video game can provide a substantial object of attention to ground one’s attention to the present moment.
If addiction can be considered as the inability to redirect attention away from a certain object of attention; to the extent that one experience Craving, Compulsion, loss of Control without regard for Consequences; then perhaps one can suffer Youtube addiction.
If insomnia can be considered as the inability to redirect attention away from thinking; then ASMR can provide an audiotorily curious and visually attractive object of attention to escape the involuntary attention to self-identified thoughts of regrets/glory or fear/hope; at least until one is overcome by fatigue.