I have noticied this little issue on my currently setup of OSMC on a Pi2 whit latest youtube addons 5.5.0-alpha7 (but i have noticied also whit other version)…
I can give you this video test link on youtube:
How to reproduce the issue:
1- I tryed to open this video whit DASH disabled (whit dash enabled the current 2.0.18 of inputstream.adaptive it’s bugged… need to update to recently 2.1.6)
2- Pause the reproduction and step back to reach the counter at 00:00
At this point on TV you see the counter it’s not at 00:00 but there’s 00:04 and the frames count it’s not showing 0000.
Also you can test this video on same channel:
- Open video and pause the reproduction
- I tryed to step back to 00:00 and on my TV i see the counter of frames not at 0 but i see report value of 7
This is a video at 120FPS (instead the previous it’s at 60FPS) and there’s the first 6 frames it’s by skipped away ? it may be that this happens ?
I have also tryed whit a “normal” video… for example i have opened this italian video:
At very starts you can listen a phrase says “La sentite la musica ?”.
I have open this on my Pi2 and the phrase can be listened like as cutted as first words… for example i can only listen “… sentite la musica?”, the words “La” it’s somethigs like cutted aways… it’s parts of frames skipped on above test video ??
Currently this little troubles i reported only on youtube addons… i don’t know if this appends also when try to reproduce a video from a shared network or from a usb devices connected on pi2…
There’s so other members can make this test and report some other feedback whit same video for know if it’s a my isolated problems ? Thanks in advance…
You should probably take this up with the Youtube add-on developers.
I can’t get the last one to rewind to 0:0 on YouTube - always starts at ‘la musica’.
I don’t thinks it’s an youtube addons… i don’t have tryed to download the video test frames count and tryed to reproduce from an usb device but if it’s need i can try tomorrow…
The last one (the italian video) it’s an example… try the video frames test… step back to 00:00 whit reproduction in pause. You can see the 00 frames on tv ? Also on seconds tv…
If yes it’s possibly it’s my isolated problems created by some configuration on my setup ? I don’t have idea 
I have some addictional feedback about this little trouble… i have download the video youtube video on my pc… and i have copyed that on a usb devices connected on my Pi2 setup.
The video has this mediainfo:
`General
Complete name : Test video- Frame counter, 120 FPS - YouTube.MP4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom (isom/iso2/avc1/mp41)
File size : 5.04 MiB
Duration : 1 min 0 s
Overall bit rate : 703 kb/s
Encoded date : UTC 2016-07-31 13:17:48
Tagged date : UTC 2016-07-31 13:17:48
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Main@L3.2
Format settings : CABAC / 3 Ref Frames
Format settings, CABAC : Yes
Format settings, RefFrames : 3 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 1 min 0 s
Bit rate : 573 kb/s
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 60.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.010
Stream size : 4.10 MiB (81%)
Encoded date : UTC 2016-07-31 13:17:48
Tagged date : UTC 2016-07-31 13:17:48
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : mp4a-40-2
Duration : 1 min 0 s
Bit rate mode : Constant
Bit rate : 126 kb/s
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 44.1 kHz
Frame rate : 43.066 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 921 KiB (18%)
Default : Yes
Alternate group : 1
Encoded date : UTC 2016-07-31 13:17:40
Tagged date : UTC 2016-07-31 13:17:40
`
I have tryed to reproduce from osmc… pause the reproduction and step back to time 00:00 and see what’s appened:
On TV i can’t see the frames counter at 0… but it’s start at 5…
When i look this same video instead from yuotube link i see the counter at 7…
OH MY GOD… at this point it’s not a youtube addons… it’s possibly it’s a my actually configuration make this appened ?
How i can check in all my preferences of kodi setup ??
