YouTube video rendering issues

I have noticed that my rendering from Kdenlive is excellent with no issues, but when YouTube renders it, it repeats sections.

Now, hear me out. I rarely, if ever, see this issue happen on YouTube. So I think there’s more to it, than a YouTube issue.

Example of repeated footage.

You can see in the linked example that it repeats a section of the video track, but not the audio track.

My Project settings are:

My rendering settings are:

YouTube states that it supports H.265 standard. Is there something that I could be doing better with my settings (project or rendering) to remediate this issue? As I mentioned earlier, I am not convinced that it is a YouTube issue; it only seems to happen to my videos.

Regards

Macr

and you can’t see the repeat part on kdenlive rendering? (can you share the portion of kdenlive rendering showing this part? … this part can be cutted using “losslesscut” if you have troubles for the size)

btw what version of kdenlive are you using and on what platform?

I was using the flatpak version 25.12.1, but am now using the AppImage, as I was having no end of trouble with 25.12.3 and .4 not working on Mint.

Current AppImage info (except for the Kdenlive version, the rest is the same):

Kdenlive: 25.12.3
Kdenlive: 25.12.3 - rev. ae30da8
MLT: 7.37.0
FFmpeg
KDE Frameworks: 6.23.0
Qt: Using 6.10.2 and built against 6.10.2
AppImage
Linux Mint 21.3 (Xcb)
Build ABI: x86_64-little_endian-lp64
Kernel: linux 5.15.0-157-generic

I have cut a segment from the original rendering, but I am unsure whether I can upload it to this forum, so I have uploaded it to my blog.