Sergio Esteves Rebollo

@ser7620 · MX · ES

math tutorials physics tutorials electrical circuits spanish-language education

Sergio Esteves Rebollo (@ser7620), based in Mexico, makes Spanish-language math, physics and engineering tutorials on his YouTube channel. The channel has about 20,800 subscribers and a median of roughly 4,600 views per video, with long videos and no uploads in the last year. Sponsored integration rate is about $150 to $250 per video.

Why brands book Sergio

Spanish-language math and physics tutor with a 118,000-view problem video

Median of about 4,600 views per video across roughly 570 uploads
Top video, a Bernoulli principle exercise, reached about 118,000 views
Audience concentrated in Mexico, with a student base aged 18 to 34 (estimated)

Best foreducation and study toolscalculators and school suppliestutoring or exam-prep services

Watch forUpload pace has stopped; no videos in the last 365 days.

Brand fit report

Content

Topics, IAB taxonomy

Education70%

Science30%

Formats: worked problem walkthroughs, whiteboard lectures, live class recordings
Tone: instructional, precise
Language: Spanish
On camera: No, voiceover and b-roll
Production: Phone, natural light
Typical length: 8 to 12 minutes

Audience

Commercial intent20/100

Comments asking for links, prices or where to buy

Sentiment75/100

Estimated from titles, descriptions and engagement

Engagement1.4%

Likes and comments per view on recent videos

Audience asks abouthow to solve a specific exercise step by stepwhich formula or method applies to a problemhow to prepare for university admission exams

Age

45%18-24

35%25-34

12%35-44

8%45+

Gender

45%women

55%men

Countries

🇲🇽 Mexico70%

🇪🇸 Spain8%

🇨🇴 Colombia5%

🇦🇷 Argentina4%

🇺🇸 United States3%

LanguagesSpanish 100%

Commercial

0%of the last 50 videos were sponsored

None seenno sponsored videos in the last 50

Brands seen: None yet
Categories promoted: None yet
Affiliate links: No

No sponsorship disclosures found in the last 50 videos

Suitability GARM Brand Safety Floor + Suitability

Profanitylow

Adultlow

Drugslow

Violencelow

Politicslow

Family friendly
Educational math and physics content with no flagged titles or themes.

We classify content, never people. No age, gender, ethnicity, religion or political views are inferred about the creator. Audience figures are estimates unless marked verified. Creators can correct anything on their profile.

Platforms

Platform	Followers	Median views	Uploads, 90d
YouTube	21k	4.6k	0

Benchmark score: 32 / 100

Public rule, same for everyone. How it works.

Engagement Median views relative to followers28 / 50

Activity Uploads in the last 90 days0 / 30

Reach Followers on the main platform4 / 20

Recent videos

▶#Recta de Ajuste con #Excel · 14k views

▶Análisis de circuito resistivo mixto · 2.8k views

▶Análisis de sistema eléctrico de primer orden usando transf · 3.4k views

Last three uploads, latest 1468 days ago.

¿Necesitas asesoría en Matemáticas, Física y/o Química de secundaria o nivel profesional (ciencias básicas de ingeniería)? Con gusto puedo ayudarte. Búscame en http://sistemastzolkin.com/ www.facebook.com/Tzolkinmx www.instagram.com/tzolkinmx O escríbeme al correo estevesrebollo@gmail.com.

Sergio Esteves Rebollo's own profile description on YouTube

Are you Sergio Esteves Rebollo? Claim or remove this profile.

About Sergio Esteves Rebollo

Sergio Esteves Rebollo runs a Spanish-language YouTube channel of math, physics and engineering tutorials under the handle @ser7620. Per his website, tzolkin, he also offers personal tutoring and exam-preparation courses. Videos are worked exercises on topics such as Bernoulli's principle, electrical circuits, Laplace transforms and calculus, typically 8 to 12 minutes long.

The channel has about 20,800 subscribers and roughly 7.8 million lifetime views, with a median of about 4,600 views per video. Viewers are estimated to be mostly students in Mexico and other Spanish-speaking countries, aged 18 to 34. No uploads have been published in the past year, and no sponsored videos were found.

Brands in education, study tools or tutoring may find this channel useful. At an estimated $20 to $35 CPM, a sponsored video costs about $150 to $250, compared with typical paid-ad CPMs of $10 to $30.

Written from Sergio Esteves Rebollo's public YouTube profile, platform data and web mentions. Numbers updated 2026-10-19. Sergio Esteves Rebollo can edit or remove this page at any time.

Questions about Sergio

How much does Sergio Esteves Rebollo charge for a sponsored video?

Based on his median of about 4,600 views, a sponsored integration is estimated at $150 to $250 per video. That works out to a CPM of $20 to $35 per 1,000 views, which is higher than typical paid-ad CPMs of $10 to $30. Rates are estimates from public data.

What does Sergio Esteves Rebollo post about on YouTube?

He posts Spanish-language tutorials in math, physics and engineering, including worked exercises on circuits, fluid mechanics, calculus and conic sections. Videos are generally 8 to 12 minutes long and use a whiteboard-style lecture format.

How do I contact Sergio Esteves Rebollo for a brand deal?

Contact details unlock on Starbooked for $0.80. His website, sistemastzolkin.com, is listed on his channel. Boosted creators can be booked through Starbooked.

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