App YouTube

I notice that there isn't the 60fps option on YouTube, it's my problem? Anyone else has this "problem"?
Not a real problem, but moto g 2015 has the 60 fps option

Inviato dal mio XT1562 utilizzando Tapatalk

Question about playing YouTube on the Fire TV

I haven't been able to find much info on this, but a YouTube review I saw said that the Fire TV app for YouTube doesn't support 4k content. Is this true? Are you able to get this menu when watching YouTube videos on the FireTV?