Mark Rober
Full review English
BuildingScienceFunnyGamingAnimationsChallenges
ScreenMyYouTuber — analysis performed by AI, published by us.
At a glance for parents
Read this before showing it. This is an AI assessment of the sample, not a safety guarantee.
- Age guidance
- Younger. Read the age guidance and reasoning before choosing for your child.
- Concerns found
- Violence (Low), Mature themes (Low), Commercial pressure (Moderate), Stimulation (Moderate).
- Sample size
- 10 videos reviewed for age suitability and risk areas; 99 of 100 collected videos screened for harmful or misleading content. See coverage.
- Review date
- · Full review. Channels can change after a review.
- What could not be checked
- Spoken content was available for 0 of 10 reviewed videos. The model reads text and still images; it does not watch video or listen to audio. Read this review’s limitations.
How to check a channel before your child watches · Understanding Elsagate screening
Channel analysis summary
Mark Rober is a former NASA engineer who creates high-production science and engineering videos. The content focuses on large-scale experiments, robotics, and natural phenomena, often integrating them with his 'CrunchLabs' educational subscription service.
What this channel covers
Covers Science, Space, Health and the body, Nature and animals, and Building and engineering — mostly by saying how and why things work, or giving practice, rather than only saying what they are.
In the sample we reviewed closely, topics were introduced but not explained in any depth. We have not heard the videos either.
- cloud formation explains These Clouds Aren't What You Think... Now You Know Thanks To @Google (on YouTube, new tab)
- gas laws and voice pitch explains SCIENCE CLASS #1- WHY Does Helium Make Your Voice Higher? (on YouTube, new tab)
- inertia and Newton's 1st law explains SCIENCE CLASS #5- How Do Astronauts Weigh Themselves? (on YouTube, new tab)
- mass and weight explains SCIENCE CLASS #2- Does Farting Make You Weigh Less? (on YouTube, new tab)
- Rayleigh scattering (why sky is blue) explains SCIENCE CLASS #3- Why is the Sky Blue? (on YouTube, new tab)
- surface tension explains SCIENCE CLASS #4- How to Waterproof Your Hand (on YouTube, new tab)
-
water purity and filtration
explains
Can You Safely Drink Your Own Pee? +1
- chemical reactions (elephant toothpaste) practises
-
scientific method
practises
Myth-testing Christmas movies with Science Experiments +3
- Myth-testing Christmas movies with Science Experiments (on YouTube, new tab)
- Feeding Bill Gates a Fake Burger (to save the world) (on YouTube, new tab)
- Turtles or Snakes- Which do cars hit more? ROADKILL EXPERIMENT (on YouTube, new tab)
- Bare Hand Bottle Busting- Science Investigation (on YouTube, new tab)
- plant adaptations explains This Leaf is Nature’s Coolest Invention (on YouTube, new tab)
- crow intelligence practises Testing The World's Smartest Crow (on YouTube, new tab)
- octopus intelligence practises Octopus vs Underwater Maze (on YouTube, new tab)
- lidar and self-driving cars explains Can You Fool A Self Driving Car? (on YouTube, new tab)
- germ transmission practises How To See Germs Spread Experiment (Coronavirus) (on YouTube, new tab)
- solar system scale explains Solar System Model From a Drone's View (on YouTube, new tab)
What YouTube reports
YouTube's own figures for this channel, as collected when we looked. Nothing here is a finding of ours.
- Channel created
- 84,000,000
- Subscribers
- 272
- Videos published
- 19,398,300,767
- Total views
- English
- Audio language the uploader declared
- Not marked as made for children
- Audience the uploader declared
A made-for-children marking is the uploader's own answer to a question about advertising and data collection — not a judgement by anyone that the content suits a child, and nobody checks it against the videos.
What the recent uploads show
Counted from the 100 most recent uploads we fetched when we looked. Where YouTube does not report a figure for a video, that video is left out of the count rather than assumed — so some totals below are smaller than 100.
- Most recent upload
- 1
- Published in the last 90 days
- 81/98
- Run 180 seconds or less
- 1:00
- Typical length
Uploads marked made for children 0 of the 98 uploads that carry the label.
About the channel
What kind of channel this is. These describe it rather than warn about it, so they carry no severity colour.
- Consistency High The channel consistently focuses on science, engineering, and high-effort builds across all sampled videos.
- Synthetic media Low The creator explicitly states in one description that AI is occasionally used to enhance images and is labeled as such.
Does well Strong emphasis on engineering and scientific curiosity Promotion of charitable causes like clean water access Encouragement of resilience and creative problem solving
Where the presentation and the content differ
- In 1 of the 99 videos we screened, the way the video presents itself — its characters, styling, and title — did not match what it appears to contain. Those videos are listed below with the reason recorded for each.
A video made to look like it is for young children, carrying something they are not expecting — the pattern commonly called Elsagate — is the thing this research exists to find. These are automated observations from the images and titles, not a judgement about the channel — read them with the videos they point at.
-
How much pee is in a pool? presentation mismatchMismatch: Use of 'pee' and bodily fluid themes in a format targeting children/curiosity, aligning with Elsagate-style gross-out content.
Age guidance
younger
The content is generally family-friendly and focuses on STEM. While some videos feature large explosions or discussions about bodily fluids (urine), they are presented in a scientific or comedic context suitable for school-aged children with parental guidance.
Age guidance is our reading of the sample, not a rating and not a certification.
What we found
4 of 11 risk areas were assessed, worst first. A finding is an observation with evidence behind it, not an accusation.
-
Commercial pressure
ModerateSelling, undisclosed promotion, gambling mechanics, and scams.
Almost every video description contains multiple links to purchase 'CrunchLabs' subscription boxes and mentions of sweepstakes.
merch links in every description
-
Stimulation
ModeratePace, loudness, and sensory intensity. High is not unsafe, but it is worth knowing before bedtime viewing.
Thumbnails use high-contrast colors, large red arrows, and exaggerated facial expressions to attract attention.
red arrows, exaggerated faces
-
Violence
LowFighting, injury, weapons, and threat.
The channel features controlled demolitions and robot battles, but these are presented as engineering experiments rather than aggression.
building implosion, robot battle
-
Mature themes
LowSexual, romantic, or otherwise adult subject matter.
Some videos discuss bodily fluids (urine) in a scientific or curiosity-driven context.
drinking pee, pee in pool
What this review covers
Harmful or misleading content · every video
- 99
- Videos screened
- 2
- Flagged
- 1
- Of those, presentation mismatches
Age suitability and risk areas · a sample
- 10
- Videos reviewed
- 0
- Spoken content examined
1 sampled video(s) had no completed screening. Absence of a finding for those is not evidence that there is nothing to find.
What this review could not see
- We could not access what is said in 10 of 10 videos we looked at; findings for those rest on titles, descriptions, and thumbnail images.
The model reads text and still images. It does not watch video or listen to audio. Full methodology.
What we looked at
Automated screening checked 99 of this channel's 100 videos for harmful content and for videos presenting themselves as something they are not, and flagged 2. The age band and risk areas above are a separate reading of 10 of those videos. We do not have what is said in any of those, so every finding rests on how a video presents itself rather than on what it contains.
Flag reasons are AI observations, published as produced — read them alongside the video, not instead of it. How screening and sampling work
Stood out from the sample
-
How much pee is in a pool?
Presentation mismatch ·
Mismatch: Use of 'pee' and bodily fluid themes in a format targeting children/curiosity, aligning with Elsagate-style gross-out content.
-
Can You Safely Drink Your Own Pee?
Flagged ·
Content discusses drinking urine, which is inappropriate for a curated kids' app regardless of the charitable context.
The rest of the sample
-
These Clouds Aren't What You Think... Now You Know Thanks To @Google
-
I Blew Up A 24 Story Building
-
Can You Fool A Self Driving Car?
-
Testing The World's Smartest Crow
-
I Tried Building My Own Space Satellite
-
My Rock, Paper, Scissors Robot Never Loses (+9 Other Inventions)
-
Mark Rober vs Dude Perfect- Ultimate Robot Battle
-
This Leaf is Nature’s Coolest Invention
Think this review is wrong?
If you represent this channel and believe our analysis is inaccurate, contact us and we will re-examine it. A review can be withdrawn from publication immediately on request while that happens.