Jefftastic's Documentation

In a similar vein to Greenio's Lost Tapes, Youtuber jefftastic has created a series of Super Mario 64 videos based around documenting and demonstrating phenomena in video form. Unlike Greenio's tapes which are presented as found footage, jefftastic's videos are more of a present-day documentation. All of jefftastic's videos on the matter have been cataloged in a playlist called Super Mario 64 documentation.

WEC Sighting (and other anomalies)
The first video in the series features jefftastic playing through Bob-omb Battlefield. Here, an instance of Dynamic Level Rearrangement is caught on video. Most notably, the sky and fog have gotten a distinct orange tint that is reminiscent of a sunset. Secondly, the star that was once behind the gate the Chain Chomp guards has been replaced with a row of five coins. The sign that is nearby also has its text changed to go on for a few extra blank boxes, before eeriely saying "Your fear is justified."

The highlight of the video is the appearance of the White-eyed Chomp. As commonly known and as told in the description of the video, the White-eyed Chomp signifies future anomalies for jefftastic to encounter.

Mario Update
Unlike the other videos, this video is recorded off screen. Jefftastic narrates the video, explaining how his copy of Super Mario 64 is now refusing to boot up on his Nintendo 64. He shows this, trying to power on his Nintendo 64 with Super Mario 64 inserted, to no avail. He then tries with another game, where it does work. Jefftastic explains that he'll be getting a new copy of Super Mario 64 and continuing to document any anomalies that he finds.

Trivia

 * jefftastic's first video has the first ever instance of Dynamic Level Rearrangement caught on video.