Cell phone video on computer?

So I just wanted to transfer the video to my computer with my mobile phone huawei p20. On the hand is then stop transfer photo file transfer. And load something. And have just transferred to files which is also true because I want my videos to come. But the problem it just in the folder shows nixxx why?

Do you have to do over a cloud

You can only take photos or not

Can you send the photo / video to anyone on WhatsApp and then use the PC to download WhatsApp and then download it from there.

Is email actually also possible?

Would go. I'm assuming you have multiple emails. Then you can send from one to the other.