I can't open any of the youtube links. Perhaps you could type out the locations.
Here's a hint for using most browsers: if just clicking on the link won't work, click the right mouse button instead, and look for an option such as Copy Link Location
(in Firefox) or Copy Shortcut
(in Internet Explorer). That will copy the address, and you can then paste it into the address bar of another browser window, which lets you fix it, or use a different browser, or whatever you need to do to make it work.
I've run across a few non-working links in this forum (and others) that are workable with a little tweaking, or just need to be opened in a different browser.