pasting codes into the html block / HTML Source Editor

II have been having problems lately with the page builder blocks.(HTLML block) I am not able to move them around as well as pasting codes into the html block / HTML Source Editor. Example of what I mean is, when I was pasting codes from youtube music videos. This has worked many times and now it doesn't.
I just had my site restored because of issues that developed when I lost nearly all of my members. That has been taken care of and is now working just fine.
Is there something that I can do on my end that will solve the problem?
If you need any more info about my problem, please let me know. By the way, I know little about programing or anything like that, just a few basics.

My website at www.mypad-yourpad.com

Basic steps to what I do is, get a music video code from youtube.
I then go into Page Builder. I select a page that I have music videos on.
I either place that code into a new html block or an existing block that I already created.
What has hapen now is, after I paste that code, I go to update but it doesn't update.
Then I tried moving a new block in place, but I can't move any, existing or new.