JavaScript Mastery
Checks out @javascriptmastery Channel on YouTube Croatia AI / LLM Runs paid spots
Runs paid posts. Estimate $2,000 to $3,950 for one integrated mid-roll.
Average views a post 180,396 Averaged across 6 posts, from YouTube's own API. Read Sep 4, 2026. Latest post 62,098 views, Aug 21, 2026
Median views 131,860 The typical post. Budget against this one.
subscribers 1,270,000 From YouTube's own API. Read Sep 4, 2026.
Last posted 16d ago Posts every 21 days, across 6 recent posts. Read Sep 4, 2026.
Last 6 posts
Views per post, oldest to newest. Average 180,396.
What one integrated mid-roll likely costs
Our estimate, not a quote$2,000 to $3,950for one integrated mid-roll
131,860 median views × $15 to $30 per 1,000 views Influencer Marketing Hub, 31 Aug 2026 ↗
131,860 median views x $15 to $30 per 1,000 views (Influencer Marketing Hub, 31 Aug 2026). This is our arithmetic on a published benchmark, not a quote from the creator.
Who sponsors JavaScript Mastery?
No sponsorships have been documented yet. Nothing on record either way, so ask them directly.
What we checked, in full
20 checks, 18 passed, 1 to review
| ✓ | Metrics came from the platform | Every audience figure here is a value YouTube's own API returned, never estimated or inferred. The price estimate is the one number we work out ourselves, and it is labelled and shows its arithmetic. | not published |
| ✓ | Enough recent posts to judge | 6 recent posts sampled (target 6). | not published |
| ✓ | Average views ≥ 20,000 | 180,396 average views, median 131,860, across 6 posts. | required |
| ✓ | Typical post also clears 20,000 | Median views 131,860 and outlier-trimmed mean 127,670 both clear the floor. A sponsored post should land in that range. | integrity |
| ✓ | Tech / dev / software engineering | 15 distinct dev signals in the bio and post text: javascript, react, next.js, backend, full stack, webdev. | required |
| ✓ | Not a gaming channel | YouTube's own category for the sampled posts: Education. | required |
| ✓ | Not a hardware / gear channel | No hardware/gear pattern. | preference |
| ✓ | Target region (US / UK / EU / AU / NZ / SG) | Croatia (EU), from the platform's own country field. | required |
| ✓ | Like rate ≥ 0.5% of views | 1.56% like rate, 0.147% comment rate, averaged per post. | integrity |
| ✓ | Average is not one viral outlier (YouTube limit 11×) | Top post is 3.9× the median, within the normal spread for YouTube, so the average reflects repeatable performance. | integrity |
| ✓ | Comment volume matches the view counts | Median 197 comments against 2,249 median likes: a normal ratio. | integrity |
| ✓ | views plausible for the subscribers count | 180,396 average views against 1,270,000 subscribers (14%). | integrity |
| ✓ | Posted recently | Last post 17 day(s) ago. | preference |
| ✓ | Publishes on a regular schedule | Median 20.9 day(s) between posts; the 6 sampled posts span 98 days. | preference |
| ✓ | Sampled posts are recent enough to compare | The 6 sampled posts span 98 days, close enough together that their views counts are comparable. | integrity |
| ✓ | Same numbers from two endpoints of the same API | 10 post(s) appeared in both the YouTube search index and the profile feed. View counts agree to within 0.0%. | integrity |
| ! | Verified against the platform's own published feed | No sampled video appeared in YouTube's official RSS feed (it only carries the last ~15 uploads), so the figures stand on a single source. | not published |
| ✓ | An independent creator, not a company's own channel | Nothing marks this as a company-run channel: it is not a known company account, the name carries no corporate designation, and the bio is not written in a company's voice. | required |
| – | Same person confirmed on other platforms | No other public profile was linked from this account, so this record covers one platform only. | not published |
| ✓ | Runs paid promotions (platform-declared) | 2 of 20 recent videos carry YouTube's paid-promotion flag. | not published |