Top Countries with the Longest Total Duration for Research and Development from Review Channels
This list represents countries of YouTube review channels based on the longest total video duration across all videos for Research and Development. This only includes channels that have created review videos. A channel associated with a country will have its numbers added to their country's total. Numbers are retrieved via the YouTube API and updated daily.
| Country | Duration | Channels | Subscribers | Views | Videos | |
|---|---|---|---|---|---|---|
| 1. |  United States | 11:29 | 1 | 634,000 | 36,927 | 1 |
| 2. |  Indonesia | 10:16 | 1 | 391 | 86 | 1 |
| 3. |  Korea, Republic of | 10:05 | 1 | 12,800 | 2,748 | 1 |
| 4. |  New Zealand | 6:28 | 1 | 0 | 628 | 1 |