/create route additional params

[CodeF53]

I would like to be able use the /create?video=... route with a couple of extra parameters to improve user experience:

1. &subtitles=
   I was thinking this would take a json format

{
  "en-us": "https://.../eng.vtt",
  "es": "https://.../spa-7.vtt"
}

2. &title= Simply so the "search by title" option for subtitles works with parties started this way
3. &poster= an image to pass to the <video poster="..."> attribute (shows while video is downloading)

Full example url

https://www.watchparty.me/create
  ?video=https://.../playlist.m3u8
  &title="EXAMPLE TITLE"
  &subtitles={"en-us":"https://.../eng.vtt","es":"https://.../spa-7.vtt"}
  &poster=https://.../poster.jpg

[howardchung]

I don't think we currently have support for multiple subtitle tracks, but everything else sounds good!

[CodeF53]

I'm fine just passing in a single subtitle track if it would be difficult to implement support for multiple tracks

[asakura42]

&title= Simply so the "search by title" option for subtitles works with parties started this way

Nice idea. Definitely must-have.