Well.....HOW did you got the link?...... Did you open the Xred video (you desired) in another tab then copy the link? Because just using "copy link address" won't give you correct link for that website.
It normally takes around 5 seconds. However, this whole week the site wasn't working at all for me (its working for me as of now). That's the difference..... When mineiroloko is down, you CLEARLY know. Whereas when premium-xxx is down, it doesn't tell you at all, you only know when it NEVER stop loading after you put the link in, even with video links that has worked in the past. It's nothing but an alternative for me, since it's clear that I'm banished from the kingdom of Mineiroloko.
Same for me. When you'd already followed the steps but the quality's still slow then there is nothing else you can do, I believe. Try s.th else then.
I did download a video a month or two ago and at first i can only download low resolution but when i tried again after a few days, the resolution option appeared, tho the "right click save video as" doesnt work, i downloaded it through a video downloader add-on. But now when i go back to that same video and try to download again, it doesn't show higher resolution option anymore. It maybe just luck or something.
The engine is under-maintained quite often so the quality/generated link might not be stable. But it's free tho, give it some time if you want to download it with the highest quality.