Top Countries with the Longest Total Duration for Grindstone from Review Channels
This list represents countries of YouTube review channels based on the longest total video duration across all videos for Grindstone. 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 | 1:48:12 | 8 | 338,185 | 44,669 | 8 |
| 2. |  United Kingdom | 52:20 | 3 | 29,460 | 9,024 | 4 |
| 3. |  Mongolia | 10:35 | 1 | 0 | 120 | 1 |