Hello,
I can do it for you, I mean convert the files and send them via wetranser.
If the videos are in 4k, I can export in 4k. I have necessary equipment to do it, very strong PC.
I've a fast internet too, so I can send you files even today.
I'm ready to do it now, so please, write to me, send me files and I'll send you ready .mp4 videos :)
Best,
Marcin