I honestly have troubles when it comes to sleeping. I will go to bed at 3 and wake up at 7 on a good day.
My older brother (by six months) often times falls asleep with a YouTube video or music playing. It doesn't usually matter because it isn't to loud and the rest of my family are heavy sleepers.
I on the other hand am not a heavy sleeper. At around 2 I had noticed a noise coming from the hall way. So I pressed my ear to my door and listened. My brothers phone had auto connected a small Bluetooth speaker. The voice was a Markaplier video so I ignored it and at around 3 I decided to go to bed. I managed to get to sleep only to wake up not even 20 minutes later. I had been woken up by markiplier screeming in a video. To say I was angry is an understatement. But I went back to sleep and got a full 2 hours of sleep.
I told my brother the next day and just laughed, great.