Other YouTube pages
Not all browsers or video players allow YouTube to collect data, as a result, such views are recorded in this group. There is nothing special to say and nothing to improve.
Tips and annotations
By this source, my traffic is about 0.5%, as a result, by and large, all this can be ignored altogether.
Advise here you can only the basics:
Use end screens (new feature) annotations together. They have a higher chance of clicking on them and can be pressed from mobile platforms. Traffic from them is not recorded here;
Put these tips at the end of your video;
Choose one of the videos - recommended by YouTube;
The rest is optional. Subscription do not forget;
2 items (video and subscription) - minimum.
This is all for end screens, annotations I personally would even suggest you stop using.