Fix parser.

[chbarts]

This should make the parser work with the XML files YouTube is using now.

[germanger]

Hello @chbarts
Was there a breaking change in the annotations XML that Youtube returns?
Is there a post from Youtube confirming this?

[germanger]

@chbarts, I've just tried with this video annotations:
https://www.youtube.com/annotations_invideo?video_id=XpLg3saa9Ys
And it worked fine.

Can you please show me a video with the supposedly new format?
Does your pull work with the above annotations?

[chbarts]

I can verify the current master on your branch fails if I download the annotations to this video with youtube-dl:

https://www.youtube.com/watch?v=Sn7Z6b9KxdE

Error message:

Unhandled Exception:
System.NullReferenceException: Object reference not set to an instance of an object
  at ConvertYoutubeAnnotationsToSRT.Program.Main (System.String[] args) [0x00000] in <filename unknown>:0 
[ERROR] FATAL UNHANDLED EXCEPTION: System.NullReferenceException: Object reference not set to an instance of an object
  at ConvertYoutubeAnnotationsToSRT.Program.Main (System.String[] args) [0x00000] in <filename unknown>:0 

Maybe it's a problem with youtube-dl? I will email you the .annotations.xml file if you want.

Anyway, the code in my pull request fixes the bug I see and produces a .srt file that VLC is happy with, so I'm satisfied with my changes. I honestly don't understand how the code in your branch could work for you.

[chbarts]

Oh, sorry: Yes, my branch's code works with the annotation in the link your comment.