Can't access YouTube on Roku Ultra

I was sick for a couple of weeks so didn't use my ROKU in the kitchen.  When I did turn it on, all my apps were gone or rearranged. Now had 38, most were ones I had deleted years ago, so I knew there was a download or factory reset or something while I was sick.  I mostly watch You Tube which wasn't on the list, so tried to download it again.  I kept getting a mg saying there wasn't enough memory, so I started dumping some of the icons I don't use, and when I had dumped 12 or more kept getting the same msg.  So, I unplugged it for a while and plugged it back in.  I tried downloading YT again and this time it was working.  It was asking me for my email or phone # and password.  I filled in all the boxes, now it's telling me that something is wrong, wrong Google password, etc.  So, if I have to change Google password, that screws up all my other devices, etc.  So, I still haven't been able to download YT, and have been working on it for a couple of hrs.  This is ridiculous.  Does anyone have problems like this with Apple's product?  I cana''t post this with Apple in my title, so will have to change my title, but u all get my drift.