YouTube video can't resume after long pause about mpc-hc

[Vagmer]

If CTRL-E does successfully work to reopen a stream/YouTube stream, then turning on "Remember File position" (in Options->Player under History) may do exactly what you want (successfully resume at paused position). It does make CTRL-E (Reopen File) restart from the current position in normal files.

...Okay, just confirmed it myself. Normally at least (without waiting for hours to expire) it works the same when streaming a YouTube link. It should work for your use case as well, hopefully (otherwise then maybe that is fixable)
Interestingly, the position doesn't seem to actually be saved for a YouTube stream if I play another file or stream, then open a previous one again. But as said it is saved if I reopen a currently playing one.

[clsid2]

You could try to re-open the stream with Ctrl+E

It is also possible the the link expires after a while.

[bw4518]

Well sure I could re-open, but point mainly is, to successfully resume at paused position.

[clsid2]

That is not something I can fix. You would have to report this issue to LAV Filters, which is the component that handles the streaming.

You could try with the internal HTTP source filter disabled. Then it will use source filter from Microsoft. That buffers the stream to a file (in temp internet files). Maybe that works better for your use case.

[Hrxn]

It is also possible the the link expires after a while.

Yes, this is definitely the case.