Branding watermark no good on moby device?

[UhoohExtra]

The branding watermark (subscribe button) that appears bottom right doesn't seem to have any purpose if viewing on a mobile device as you can't press it anyway! Either in full screen or not. Because if you aim for and click bottom right it simply pulls up the video progress scroll bar overlay thingy etc. The watermark seems only accessible on a desktop. Which accounts for only 45% of my traffic at least. Am i missing something here?