If you don't want your Youtube channel to appear in other channels' recommendations, follow the below procedure:
- Sign-in to your Youtube account.
- Click on the little avatar located top-right > Youtube settings.
- In the "Additional features" section, click on "View addtional features"
- Go to Channel Settings > Advanced.
- Scroll to "Channel recommendations" and select "Do not allow my channel to appear in other channels' recommendations".