MPV not starting youtuve livestream playback at latest position and starts from begining

mpv Information

No response

Important Information

- Platform version: Fedora 41 x64
- GPU model, driver and version: 2200mesa
- Source:dnf
- Introduced in version:

Reproduction Steps

command : mpv --no-config --profile=fast --hwdec=yes 'https://www.youtube.com/watch?v=tnt4C0PApKg' -gpu-debug --log-file=output.txt

at time of command running, stram was already 1+ hour ago

Expected Behavior

playback to start from current position in livestream

Actual Behavior

started from begining, but was unable to seek to latest position immedietly, as it slowly downloaded the stream

Log File

output.txt

Sample Files

No response

I carefully read all instruction and confirm that I did the following:

• I tested with the latest mpv version to validate that the issue is not already fixed.
• I provided all required information including system and mpv version.
• 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.
• I produced the log file while the behaviors described in "Actual Behavior" were actively observed.
• I attached the full, untruncated log file.
• I attached the backtrace in the case of a crash.

Start by reproducing the issue with the exact mpv command in the report and inspect the attached output.txt log. Trace how this YouTube livestream is opened and positioned, then verify that playback begins at the current livestream position instead of downloading from the beginning.