Can you Help me find if this is a Real Web-dl or just a screen recording ?

[Loryanam2]

i have the Original Web-dl file which was downloaded from a website protected by widevine

100% sure it is a web-dl

now i tried a popular software called Streamfab that claims it also do Web-dl on same exact file

how can i check if that software is doing a real Web-dl and not a screen recording

here is the Media info for the 2 files

Original
Size 2.59 GB (2,792,100,761 bytes)
Size on disk 2.59 GB (2,792,103,936 bytes)

downloaded with Streamfab Size 2.60 GB (2,793,591,856 bytes
Size on disk 2.60 GB (2,793,594,880 bytes)

at the bottom

[[ss]vegeta]

Real web-dl

[Loryanam2]

Real web-dl

Thank you so much for answering
but my question is there is any explanation why the Size on disk is not identical for both files ?

[[ss]vegeta]

but my question is there is any explanation why the Size on disk is not identical for both files ?

There is. Different tool(s) were used or a different version of the same tools, or a different paramater for downloading or muxing.
You shouldn't care when there's such a small difference. A recording cannot make such a small difference.

[Quint]

There's a small difference in the audio: Variable vs. Constant Bitrate.

[zing269]

If it was a screen cap then it would have taken the same time to download as the video's duration.