tubular. you can then share from official youtube app to tubular and watch your recomendations with out ads and with sponsorblock if you choose. no way to auto sync the subscriptions tho

how do you seed? you just leave them in the transfer tab?

simple file manager, just works.

https[://]f-droid[.]org/packages/com.simplemobiletools.filemanager.pro/

check one of my previous comments on my profile. the provider I mentioned has french channels for ~20eur/year. in my comment a mention a new box I bought but before that I was using the service on a mi box given by my ISP

try and contact them via a support ticket

no, not that a know of. maybe try and contact them via a support ticket.

i use these guys: https[://]my.tvaster[.]com the yearly subscription is very cheap. i have it on a s905x4 box running coreelec and i can watch all the big games with no problems and very little delay - compared to other services. i will sometimes use a vpn due to my isp being known for using traffic shaping