Here is a log:
10:54:54, Video: LAV Splitter 0.68.0 (int), LAV Video 0.68.0 (int), VSFilter 3.0.0 (int, alt: 3.0.0 (ext))
11:11:15, #01, Page analysis, youtube.com/watch?v=ZegwJuVewtw
11:11:15, #01, Opening given Youtube URL...
11:11:16, #01, Getting info about clip, processed 0 of 19 clip(s)...
11:11:16, #01, 01/19: MP4 240p 426×240 30fps 7.06 MB VO
11:11:16, #01, 02/19: MP4 360p 640×360 30fps 12.73 MB VO
11:11:16, #01, 03/19: MP4 480p 854×480 30fps 24.25 MB VO
11:11:16, #01, 04/19: MP4 720p 1280×720 30fps 45.16 MB VO
11:11:16, #01, 05/19: MP4 1080p 1920×1080 30fps 96.64 MB VO
11:11:16, #01, 06/19: M4A 44100Hz Stereo 129kbps AO 3.70 MB
11:11:16, #01, 07/19: MP4 144p 256×144 15fps 3.08 MB VO
11:11:16, #01, 08/19: 3GP 144p 176×144 10fps
11:11:16, #01, 09/19: OGG 44100Hz Stereo 121kbps AO 3.48 MB
11:11:16, #01, 10/19: MP4 360p 640×360 30fps
11:11:16, #01, 11/19: MP4 720p 1280×720 30fps
11:11:16, #01, 12/19: WebM 240p 426×240 30fps 4.55 MB VO
11:11:16, #01, 13/19: WebM 360p 640×360 30fps 8.70 MB VO
11:11:16, #01, 14/19: WebM 480p 854×480 30fps 16.97 MB VO
11:11:16, #01, 15/19: WebM 720p 1280×720 30fps 33.52 MB VO
11:11:16, #01, 16/19: WebM 1080p 1920×1080 30fps 54.05 MB VO
11:11:16, #01, 17/19: 3GP 240p 320×180 30fps
11:11:16, #01, 18/19: WebM 360p 640×360 30fps
11:11:16, #01, 19/19: FLV 240p 426×240 30fps
11:11:16, #01, Total time consumed: 0.969 seconds
11:11:16, #01, Ready
11:11:16, Audio opening m4a (https): download - foo_youtube, decode - ffmpeg
11:11:16, Activity#1 (audio.play): M4A 44100Hz Stereo 129kbps AO | 3.70 MB
11:11:16, Audio opening finished in 0.188 seconds
11:11:16, Video: opening (https): download - foo_youtube
11:11:16, Video: opening (https): download - foo_youtube
11:11:16, Activity#2 (video): WebM 480p 854×480 30fps VO | 16.97 MB
11:11:16, Activity#3 (video): WebM 480p 854×480 30fps VO | 16.97 MB
11:11:18, Video: opening finished in 1.422 seconds
11:11:18, Video: opening finished in 1.500 seconds
11:11:26, Activity#1 removed (lifetime 10.688s)
11:11:26, Activity#2 removed (lifetime 9.906s)
11:11:26, Activity#3 removed (lifetime 9.906s)
11:11:33, Audio opening m4a (https): download - foo_youtube, decode - ffmpeg
11:11:33, Activity#4 (audio.play): M4A 44100Hz Stereo 129kbps AO | 3.70 MB
11:11:33, Audio opening finished in 0.203 seconds
11:11:33, Video: opening (https): download - foo_youtube
11:11:33, Video: opening (https): download - foo_youtube
11:11:34, Activity#5 (video): MP4 480p 854×480 30fps VO | 24.25 MB
11:11:34, Activity#6 (video): MP4 480p 854×480 30fps VO | 24.25 MB
11:11:34, Video: opening finished in 0.672 seconds
11:11:34, Video: Cannot start playback
Connect source to the splitter: Il n’y a pas de type de média commun à ces broches.
11:11:34, Video: opening finished in 0.875 seconds
11:11:34, Video: Cannot start playback
Connect source to the splitter: Il n’y a pas de type de média commun à ces broches.
11:11:34, Activity#5 removed (lifetime 0.594s)
11:11:34, Activity#6 removed (lifetime 0.485s)