Unable to download videos as of 04/24/19 - Followed all directions, overinstalled- nothing

I was able to download YouTube videos this morning.  Tried to download them this afternoon and evening.  It would not download.  Says it can't find a video. 

Before I started having this problem, I tried to download a video embedded in an Adobe Create Magazine article.  Realplayer wasn't recognizing it.  I also have Audials 2018 on my machine.  I was able to record them using that program. 

Following my use of Audials 2018,  I started to experience this problem.  I Normally use Chrome, but also tried to use Firefox to download a YouTube video using Realplayer and received the same message. 

Following this I did the following different things to try to resolve the problem:

I have followed the directions on the support page.  Rebooted, tried to download again - received the same error message. 

I powered down, powered up, tried to download - received the same error message. 

I overinstalled the RealPlayer express downloader program.  Opened the browser tried to download again.  Received the same error message.  

I tried rebooting again, opening the browser, tried to download again.  Received the same error message.  

Thanks in advance for your prompt attention to this matter.