Iphone suddenly failed to push video to apple tv

Same network, iphone14 with ios 26.0. Used to work yestoday…and worked in another apple tv…another iphone 13pro with ios 18.7 also does not work. Workj g apple tv does not have youtube. No e-working apple tv has youtubed signed in. Deleting youtube app also does not work

[Edited by Moderator]