Thanks Alexander, but as I said, I already did that.

It did indeed take longer, well over an hour in fact, most of which was the conversion process!

However, the resulting file still won't open in many programs.

It does now open in VLC, but won't open in Premiere Pro, or in my AVS Video Converter program, which says there is no video information in it!

Presumably it's still not a standard mp4 file, even after ffmpeg conversion.

Can anything be done to make the converted files more standard?

Thanks, Dave.

Thanks Alexander, I've now bought the Televzr pro version on a lifetime subscription, and the 4K options are there!

I downloaded the 4K version of that video, but it wouldn't open in my editor (Premiere Pro CS6), which said "an unspecified error occurred" or even in VLC Media Player, which normally opens everything! VLC said it doesn't support the vp09 codec.

I then found the transcoding option in Televzr, and re-downloaded it, which took well over an hour to do the conversion!

The resulting mp4 file is better, and will open in VLC, but still won't open in Premiere.

On both files QuickTime Player throws an error "an invalid sample description was found in the movie".

Any ideas, or is it not possible to produce standard mp4 files from these 4K downloads?

Thanks, Dave.

No, just a version you gave me a link to some time ago.

Do you have to have a paid version for 4K downloads?

I wasn't aware of that.

Thanks, I now have version 1.9.2.

Still strange that version 1.7.3 didn't prompt me to update!

It would certainly be good if you could select blocks of files in the library and delete them with one hit.

I was certainly glad to see that it doesn't actually remove the file from the computer unless you tell it to!

Thanks, Dave.

Thanks, but doesn't that option on videos actually delete the file from the computer?

I don't want to do that, just remove it from the Televzr listing!

You really should be able to remove a folder from the Televzr library without having to reinstall the program to do it!

Strange that my 1.7.3 version of Televzr said it was up to date when I checked on the "Help" menu.

Cheers, Dave.