Seen that review, I understand it just fine. And the BGMs are always gonna be much better in game. I wouldn't listen BGMs on my iPod either, but I guess the themes just bring back nostalgia for me. And I only played it like a year ago. (Ive legitimately considered playing it again).
Mines pretty bad for actual downloads (Like 200-300kb/s), but yours seems to be worse. So yeah it might be easier just to wait. The 2.2Gb is just the compressed size btw, mainly intended for people with slow connections. The game itself is much bigger. Well over 4gb.
They're rar. files. Do you have a program called 7zip? If not, download it. Useful as fuck in general, not just for this. Download all of them. Right click on part 1, click extract files, choose 7 zip, and it'll extract all of them automatically. You will then have all the base files of the game. So yeah, automatically so long as you have all the parts.
There are 40 bad ends in the VN. Most of them are Shirou getting killed graphically. And the characters look a LOT better than in the FSN anime. Because they're mainly sprites, it's easier to make them look sharper than the comparatively sub par FSN anime designs. Plus let's be fair, it was Deen that animated the anime. (Higurasi designs...egh).
You're also gonna need a program called Daemon tools. (Unless you plan to buy the game legally).
All that said, if you saw it on youtube, there's a good chance it was the FSN movie. (Which loosely adapts the second route of the VN). The problem with the movie is that the first and second routes of the VN are similar in length. It took 24 episodes to (poorly) adapt the first. A movie will give you the bare bones and nothing more. Still, an easier option.