Seal Preview - download yt playlist as video instead of audio

[Fxhsrx]

Checklist

• I'm reporting a bug unrelated to a specific site.
• I've verified that I'm running the latest version of yt-dlp.
• I've verified that I'm running the latest stable version of Seal or any later preview versions.
• I've read the Contributing guidelines and Code Of Conduct.
• I've checked that the site i'm trying to download from is in the Supported Sites list from yt-dlp
• I understand that the issue will be (ignored/closed) if I intentionally remove or skip any mandatory field.

Describe the bug

When you download a youtube playlist on playlist mode and select the type to download to be as "audio", it saves the downloaded file as video instead.

To Reproduce

1. Download a YouTube playlist
2. select playlist
3. wait for fetching info to finish
4. select any video to download on the playlist and press download
5. select the type to "audio"
6. start the task/download
7. wait for the fetching info to finish
8. bug happens (the task changes from audio to a video download task) ( no error displayed/prompted )
9. (it saves the download as an video file)

Error reports

N/A
no error was displayed on the download

Screenshots & Screen Records

video demonstration ( the downloading part is trimmed out to reduce filesize )

Record_2025-02-16-22-36-32.E.mp4

Additional context

bug happens on Seal Preview version.
i don't really know why this happens.
if its a single video download and video/audio is selected mode (playlist mode is not selected), it downloads correctly.
the seal preview version is 2.0.0-alpha.5
the yt-dlp version is 2025.02.11.232920 (nightly-builds)

[Fxhsrx]

i found a workaround, download the youtube playlist in audio mode as selected ( not playlist; the audio type on the download tab ) and wait for it to start (it takes a bit long) and it will download the playlist as audio file. (it does the usual ffmpeg file conversion)
NOTE: it downloads like the current release seal (non-preview) as it downloads them one by one which is slow compared to the downloading 3 videos at the same time.
NOTE 2: you cannot customize what specific videos the task should download, it will download all of the videos on the playlist. (and turns them into audio if audio mode is selected which fixes my issue)