Sans's Shorts is a series on The HV and Dino-Weapon Show that is mainly just Stupid Sans standing in front of a camera and doing whatever he wants. His first video, "Sans?", exploded and got over 600 views in the first week, vastly outcompeting Dino-Weapon AND HV, who had yet to even start his series at the time. As Stupid Sans saw this spike of interest in his video, and it got the channel to 2 subscribers, he tried to commit to at least 1 short per week, showcasing the world that he lives in and his arsenal of LEGO Gaster Blasters and Lego SOUL models, reminiscent of the SOULs in Undertale, the game the game that Stupid Sans's original inspiration (Sans) came from. However, this fell through as he was growing less popular with continuous appearances.
Stupid Sans's series has been one of, if not THE most influential part of the show itself. He shows the audience what it's like to live in the Dino-verse, and what he does in his free time, which mainly includes walking to a secluded area and testing his Gaster Blasters. He is also sometimes interrupted by other characters such as Dino-Weapon in "Who's Video is This?" and "Sans does a Thing," where in the first Dino is panicking about Glue Bunny's reappearance on the show, and in the second he is interrupted by a sock falling from the sky, which is possibly a reference to Inverted Fate's Sans, who likes to drop socks into other universes.
There also seems to be another hidden story covered by Sans's crazy antics. In some Shorts, Sans seems to imply that he was banished or removed from his original AU.
This is the series that first got the show to over 600 views and made it somewhat popular.
During Season 3, the first Sans's Short happened 6 months into the season's run, making it the longest time the show has gone without a Sans's Short, that being 8 months total.