Lion 2016 Bdwn Sanswr Ba Zyrnwys Chsbydh: Danlwd Fylm

But "fylm" → f(6)→u(21), y(25)→b(2), l(12)→o(15), m(13)→n(14) → "ubon" (no).

If you intended this as a test or a riddle, please provide the cipher method. Otherwise, I can only say: the string appears to be an encoded version of an English phrase related to the 2016 film (starring Dev Patel) and words like "down", "answer", "to", "cyrnwys" (possibly "cyrnwys" = "cry news"?). danlwd fylm lion 2016 bdwn sanswr ba zyrnwys chsbydh

Try often used for simple puzzles. But "lion 2016" unchanged? Possibly the cipher is reversed words. Try often used for simple puzzles

ROT13 of "danlwd" → qnayjq (no). ROT13 of "fylm" → s y l z → s y l z? Actually f→s, y→l, l→y, m→z → "slyz"? Not right. Let me systematically check ROT13 on the whole phrase: ROT13 of "danlwd" → qnayjq (no)

Given the complexity, and since your request says "full text" — the decoded phrase might be a known meme or puzzle answer. But without a key, I can't decode it.