Allow separate configuration of parameters for youtube and twitcast

[LittleVulpix]

Hello,

I like that you can specify additional parameters for yt-dlp, and I configured some for youtube (such as --live-from-start and also -6 to use IPv6). But then I found out my twitcasts were not being recorded - simply because twitcast doesn't have ipv6 support and also --live-from-start is not supported there.

Would it be possible to make it so that you can specify different options for twitcast vs youtube?

Thanks!