Does anyone else here have trouble uploading video’s. It’s like one time they work and next time…

Does anyone else here have trouble uploading video’s. It’s like one time they work and next time they don’t. I have some of our personal stuff I want to share, but can’t get the video’s to upload correctly. And when I think it did, after it finishes processing, it’s just a black screen with endless buffering. Very frustrating, because it used to be no problem. Any help on this would be greatly appreciated, and possibly a private exclusive video just for you.  Thanxxx  🙂