[Adam Kowalski]

Sorry for spamming in 7 year thread, but Google indexes it nice.

To speed up rendering time, there is really straightforward advice.
Do not render at all.
How?

Use MKVMerge.
It can copy multiple mp4 files into one,without recompression.

It even merged files 60 and 80 FPS together, but don’t know yet how YT will react on this.
Now I’m waiting to FHD option to appear after YT processing.

I think at least resolution suppose to be the same in all files.

And carefully with Windows DVR, because it can sometimes record in above than 60 FPS when the frames are not locked.