On Fri, 27 Sep 2019 08:26:55 -0400, wrote:

i must be doing something wrong. I created the following
folders/files, using AVS4YOU on a MP4 video file:

VIDEO_TS.BUP 12KB
VIDEO_TS.IFO 12KB
VIDEO_TS.VOB 11768KB
VTS_01_0.BUP 56KB
VTS_01_0.IFO 56KB
VTS_01_1.VOB 1,048,512KB
VTS_01_2.VOB 1,048,510KB
VTS_01_3.VOB 1,048,034KB
VTS_01_4.VOB 1,048,074KB
VTS_01_5.VOB 175,706KB

(If I copied things right)

I copy-pasted same to the DVD folder for a blank DVD disk, and then
wrote same on the disk. The disk plays fine on my PC. But not on my
DVD player - which does not recognize the disk at all.

What am I doing wrong please?

You need to finalise the disk.