ytdl_hook proxy works with yt-dlp, but mpv --stream-lavf-o http-proxy is not applied

### mpv Information ```bash mpv v0.41.0-697-g13a3e3ad0 Copyright © 2000-2026 mpv/MPlayer/mplayer2 projects built on May 29 2026 12:21:22 libplacebo version: v7.365.0 (v7.360.0-60-gb915882-dirty) FFmpeg version: N-124675-g468a743af FFmpeg library versions: libavcodec 62.34.102 libavdevice 62.4.100 libavfilter 11.17.100 libavformat 62.18.100 libavutil 60.31.100 libswresample 6.4.100 libswscale 9.7.100 ``` ### Other Information ```text - Windows version: - GPU model, driver and version: - Source of mpv: - Latest known working version: - Issue started after the following happened: ``` ### Reproduction Steps mpv --no-config --log-file=E:\mpv.log --ytdl-raw-options=proxy=http://127.0.0.1:7890 https://www.youtube.com/watch?v=qzlofvI4e7w ### Expected Behavior mpv --no-config --log-file=E:\mpv.log --ytdl-raw-options=proxy=http://127.0.0.1:7890 https://www.youtube.com/watch?v=qzlofvI4e7w ### Actual Behavior Expected behavior: mpv should have the stream-lavf-o proxy automatically set by ytdl_hook. However, for some reason, even when --stream-lavf-o=http-proxy=http://127.0.0.1:7890 is specified, it has no effect. ### Log File [mpv.log](https://github.com/user-attachments/files/28416438/mpv.log) ### Sample Files _No response_ ### I carefully read all instruction and confirm that I did the following: - [x] I tested and confirmed that the issue exists with the [latest release version](https://github.com/mpv-player/mpv/releases/latest) or newer. - [x] I provided all required information including system and mpv version. - [x] I produced the log file with the exact same set of files, parameters, and conditions used in "Reproduction Steps", with the addition of `--log-file=output.txt`. - [x] I produced the log file while the behaviors described in "Actual Behavior" were actively observed. - [x] I attached the full, untruncated log file. - [x] I attached the backtrace in the case of a crash.