it depends on YOU and a few other factors such as the quality of the presentation, i remember being very afraid of herobrine because some youtuber made a very high quality video telling the story with creepy music in the background
people ITT seem to not think much of the video you posted but I find it slightly creepy, but that's just me
i also used to find SCPs super fucking scary, even just reading the articles was enough to make it hard to fall asleep (;´Д`)