Well-done animation and affecting narration with very appropriate background music. A compelling message too, though rather a little melodramatic. But still a very keen observation of the artist's mind and their constant struggle with their art not being "good enough". It's true enough that a lot of artists get thoughts like that. However, stating "your art is shit" like it applies to everything is fallacious.
You state it like a fact, but the only fact is that art is subjective. Even those amalgamations of other people's styles can be original; just because someone takes inspiration from another artist doesn't mean they're unoriginal and pretentious. Those previous artists had to take inspiration from something or someone else too. In fact, everything we make is essentially stolen from others - standing on the shoulders of giants if you will.
You can't count all art as being shit because art's quality cannot be quantified objectively. Each individual has their own experiences and will perceive art differently. That's the main point of art - art is not good because all the critics are raving about it; art is good because individuals are emotionally impacted by it and its existence enhances their life. That art will be shit to some but those individuals that appreciate it will think it's beautiful.
You're probably aware of this, and maybe this video wasn't meant to be taken from an objective standpoint but from the point of view of the artist with low self-esteem who feels the need to compare him/herself to other artists. In that case, good work on the "shit" art.
PS
One part really rustled my jimmies.
00:29 "A Frankenstein on canvas"
People often mistakenly believe that the name Frankenstein refers to the monster in the story, but that name is actually attributed to Dr. Frankenstein - the scientist who brought the monster to life. The monster doesn't really have a name and is often just referred to as Frankenstein's monster.
Or maybe you are aware of that fact and "A Frankenstein on canvas" refers to the fact that the artist is emulating what Dr. Frankenstein did (Dr. Frankenstein collected body parts from corpses and combined them together to create his monster). Maybe you meant it in the way that people mean it when they say things like, "that's totally a Dali" or "That's a classic van Gogh" and so on. I'll assume that's the case and give you the benefit of the doubt.
PPS
Nice description.