Add YouTube Music to supported links

[gkeegan]

This works when sharing songs from the YouTube Music app. From the web browser interface for YouTube Music, opening the link in NewPipe app causes a playlist to open that contains the song. This isn't ideal and will require some extractor changes that I will do later, if I can figure it out.

I chose to put the URL into the intent I chose because the one with youtu.be causes a worse result from the web interface. It caused an error instead of just opening as a playlist.

I understand if this is chosen not to be merged until I get the extractor end working.

Debug APK: ytmusic.zip

• I carefully read the contribution guidelines and agree to them.

[XiangRongLin]

It crashes for me when i click on the "open in app" icon on Firefox.
Edit: I opened a single video and then clicked on that.

The seems like YouTube music is always playing a mix, which newpipe can't extract yet.
I'm working on that in TeamNewPipe/NewPipeExtractor#253

Exception

• User Action: requested playlist
• Request: https://music.youtube.com/watch?v=NAW0idSQ6Zs&list=RDAMVMNAW0idSQ6Zs
• Content Language: GB
• Service: YouTube
• Version: 0.18.2
• OS: Linux Android 10 - 29

Crash log

org.schabi.newpipe.extractor.exceptions.ParsingException: Could not get playlist name
	at org.schabi.newpipe.extractor.services.youtube.extractors.YoutubePlaylistExtractor.getName(YoutubePlaylistExtractor.java:55)
	at org.schabi.newpipe.extractor.playlist.PlaylistInfo.getInfo(PlaylistInfo.java:49)
	at org.schabi.newpipe.extractor.playlist.PlaylistInfo.getInfo(PlaylistInfo.java:30)
	at org.schabi.newpipe.util.ExtractorHelper.lambda$getPlaylistInfo$8(ExtractorHelper.java:155)
	at org.schabi.newpipe.util.-$$Lambda$ExtractorHelper$oXX6037sP0Rn784EpEbKFh6xH48.call(Unknown Source:4)
	at io.reactivex.internal.operators.single.SingleFromCallable.subscribeActual(SingleFromCallable.java:44)
	at io.reactivex.Single.subscribe(Single.java:3438)
	at io.reactivex.internal.operators.single.SingleDoOnSuccess.subscribeActual(SingleDoOnSuccess.java:35)
	at io.reactivex.Single.subscribe(Single.java:3438)
	at io.reactivex.internal.operators.maybe.MaybeFromSingle.subscribeActual(MaybeFromSingle.java:41)
	at io.reactivex.Maybe.subscribe(Maybe.java:4154)
	at io.reactivex.internal.operators.maybe.MaybeConcatArray$ConcatMaybeObserver.drain(MaybeConcatArray.java:153)
	at io.reactivex.internal.operators.maybe.MaybeConcatArray$ConcatMaybeObserver.request(MaybeConcatArray.java:78)
	at io.reactivex.internal.operators.flowable.FlowableElementAtMaybe$ElementAtSubscriber.onSubscribe(FlowableElementAtMaybe.java:66)
	at io.reactivex.internal.operators.maybe.MaybeConcatArray.subscribeActual(MaybeConcatArray.java:42)
	at io.reactivex.Flowable.subscribe(Flowable.java:14479)
	at io.reactivex.internal.operators.flowable.FlowableElementAtMaybe.subscribeActual(FlowableElementAtMaybe.java:36)
	at io.reactivex.Maybe.subscribe(Maybe.java:4154)
	at io.reactivex.internal.operators.maybe.MaybeToSingle.subscribeActual(MaybeToSingle.java:46)
	at io.reactivex.Single.subscribe(Single.java:3438)
	at io.reactivex.internal.operators.single.SingleSubscribeOn$SubscribeOnObserver.run(SingleSubscribeOn.java:89)
	at io.reactivex.Scheduler$DisposeTask.run(Scheduler.java:578)
	at io.reactivex.internal.schedulers.ScheduledRunnable.run(ScheduledRunnable.java:66)
	at io.reactivex.internal.schedulers.ScheduledRunnable.call(ScheduledRunnable.java:57)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:301)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
	at java.lang.Thread.run(Thread.java:919)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String org.jsoup.nodes.Element.text()' on a null object reference
	at org.schabi.newpipe.extractor.services.youtube.extractors.YoutubePlaylistExtractor.getName(YoutubePlaylistExtractor.java:53)
	... 28 more

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[gkeegan]

That's the error I got when putting the link by youtu.be. I may have uploaded the wrong apk, because the one I'm using can open that link fine.