Plugin Issue

• This is a plugin issue and I have read the contribution guidelines.
• I am using the latest development version from the master branch.

Description

When trying to use the --retry-streams options on a YouTube livestream that has not begun yet, shortly after running it with either 1-20 seconds between when it checks, it will start outputting

[cli][error] Unable to open URL: https://youtube.com/get_video_info (404 Client Error: Not Found for url: https://www.youtube.com/get_video_info?video_id=yZ7CWjuMCe8&eurl=https%3A%2F%2Fyoutube.googleapis.com%2Fv%2FyZ7CWjuMCe8)

It used to not do this at all until recently about 2-3 days ago on streamlink 2.0.0 and when it did, I tried updating to the current development build but it is still giving me the same thing.

So I am unable to setup streamlink to record for a stream that I wouldn't be around for since it would give that error even after the stream would start.

Reproduction steps / Explicit stream URLs to test

1. input streamlink --retry-streams <#> -o <name.ts> <link of a stream that is planned to go live later>

Log output

[cli][debug] OS:         Windows 10
[cli][debug] Python:     3.8.7
[cli][debug] Streamlink: 2.1.1+14.g2884485
[cli][debug] Requests(2.25.1), Socks(1.7.1), Websocket(0.59.0)
[cli][debug] Arguments:
[cli][debug]  --loglevel=debug
[cli][debug]  --rtmpdump=C:\Program Files (x86)\Streamlink\rtmpdump\rtmpdump.exe
[cli][debug]  --ffmpeg-ffmpeg=C:\Program Files (x86)\Streamlink\ffmpeg\ffmpeg.exe