Soldato
how are headphones ? no delay? ive tried number of 'cheaper' BT headphones, with YT on mobile, and delay of sound is ridiculous .. not to mention quality...and interesting choice of music player...need to do some research in devices like that
Check the Bluetooth audio profiles your phone supports and also the profiles your headphones support.
Ideally you want aptX-LL or aptX.
On my Android if I go into the developer options I can force a default codec, or at least see what the currently connected codec is. I think it defaults to SBC which is good for range but poor for latency - so fine for music, but not for YouTube.
This sums them up fairly well-
https://www.reddit.com/r/headphones/comments/8gara3/sony_ldac_users_how_is_the_latency/dya8t99/