An Acid Dreams Presentation is a logo that appears in youtube which appears at the beginning of each video. In their youtube channel it shows a zooming title in random color in the black background before the presentation begins.
In the Reaper Files version, it begins with a random zooming photos of anything related to death which is depends on the video presentation then a bloody white rose background with the title.
None for the standard text version but it scare you little bit.
Nightmare for the Reaper Files version due to its zooming random photos of any death related (random funeral, paranormal, and haunted places). I recommend you to not watch their videos in the midnight.