[Bug Report] "Error loading: null" when passing link from Watch Later playlist

Describe the bug YouTube URLs with the query parameter "list=WL" (User's Watch Later playlist) result in an "Error loading: null" message.

To Reproduce Steps to reproduce the behavior:

Try the play command with any YouTube URL that has the query parameter "list=WL" in it

Expected behavior The query parameter list should be ignored if its value is WL. For example:

What the user puts in: !p https://youtu.be/uN9tulBHr8Y?list=WL Should be processed as if he put in: !p https://youtu.be/uN9tulBHr8Y

You could use a regex to remove the query parameter from the URL before it gets processed further Regex: (?:\?|&)list=WL

Screenshots

Debug Info

System Properties:
  java.version = 11.0.10
  java.vm.name = OpenJDK 64-Bit Server VM
  java.vm.specification.version = 11
  java.runtime.name = OpenJDK Runtime Environment
  java.runtime.version = 11.0.10+9-Ubuntu-0ubuntu1.20.04
  java.specification.version = 11
  os.arch = amd64
  os.name = Linux

JMusicBot Information:
  Version = 0.3.3
  Owner = 237178792362246144
  Prefix = !
  AltPrefix = null
  MaxSeconds = 0
  NPImages = false
  SongInStatus = false
  StayInChannel = false
  UseEval = false
  UpdateAlerts = true

Dependency Information:
  JDA Version = 4.2.0_227
  JDA-Utilities Version = 3.0.5
  Lavaplayer Version = 1.3.67

Runtime Information:
  Total Memory = 171
  Used Memory = 55

Discord Information:
  ID = 790183313268277298
  Guilds = 2
  Users = 1

jagrosh / MusicBot

[Bug Report] "Error loading: null" when passing link from Watch Later playlist #636