Mr. Nightmare's channel mostly focuses on the subject of horror, although it mainly focuses in the subgenre of psychological horror, it can also focus on horror thriller and supernatural horror. Most of which contains: creepypastas, horror-themed countdowns, interactive horror stories, freaky video clips. Despite so, his content may vary, ranging from scary video game glitches to bone-chilling real life stories.
Most videos are done by recording himself reading aloud stories and other horror-themed content, sometimes with added eerie sound effects and music for immersion. He allows viewers and fans to submit horror stories to be read aloud and uploaded onto his channel. The uploading of his videos are erratic, however it does say in his channel banner that he uploads 2 videos a week.
Mr. Nightmare keeps most of his personal information private to the public. He has never done a face reveal and only his voice has been heard so far. A picture of what is presumed to be his face does exist, but Mr. Nightmare himself has not confirmed this photograph's authenticity. He is from New York. During one point of his life, Mr. Nightmare encountered a stranger lurking at his trailer that he occupied during summertime. It was later revealed that the trailer was broken-into. In this video you can listen to his story. In a Q&A that has since been deleted, Mr. Nightmare mentioned his mother was sick and he had been taking care of her.
- Rob Gavagan
- Reignbot Horror
- Lazy Masquerade
- Llama Arts
- Gruesome Grim
- Mr. Nightmare has a backup account called "likeMike" in case his main account gets taken down as revealed in his "1 Million Subscribers Thank You & QnA" video. 
- In a deleted Q&A video , Mr. Nightmare stated his first channel was with a friend of his, where they uploaded comedy, gaming, and skateboarding videos but Mr. Nightmare had him take it down.
- He once got an email from a big YouTuber to collaborate, but he was too busy to respond, so they sent him a nasty follow-up email, calling him arrogant and "too cool" sarcastically. Mr. Nightmare responded in a since deleted video that his mother was sick and he simply didn't have time to respond, censoring their name. He has since done a few collaborations (most notably with MrCreepyPasta), although they are not common.