WatchTime from Connected TV is 5x of Desktop?

Hello everyone, this is my first post. Hope everything will be fine.

I would need help to better understand the following official data, about statistics usage of the platform.

Based on data in [1] "every day people watch over a billion hours of video" and "More than 70% of YouTube watchtime comes from mobile devices."
So, more or less, from mobile devices should come 700 million hours of video, right?

Based on data in [2] "connected TVs represent our fastest growing screen, where watch time now tops 250 million hours per day"
So, more or less, connected TVs (smart TVs, Roku/Apple TV, and game consoles) generate 25% of YouTube watchtime.

In Short:

• every day 1+ billion hours of video
• 70% of watch time comes from mobile device
• 25% of watch time should come from connected TV
• remain a 5% of watch time

Should I conclude that desktop produces only 5% of the daily watch time?


Am I getting wrong?

It seems to me a really strange that connected TV generates five time the watch time of desktop.
I'd just like to talk to some expert about it

Any comment could be helpful

Thanks
Omar Venturi

[1] www.youtube.com/about/press/
[2] youtube.googleblog.com/2019/05/2019-brandcast-stage-highlights.html