In all fairness, that video addresses how to play customs in a different way than what was being discussed in the thread. The video says to keep two sticks and I think what people were trying to do in this thread was combine that into a single source.
That video explains exactly what is needed. The reason you need 2 sticks is not that you differentiate between customs and DLC, nobody has ever had to give up playing DLC along side customs and there is no specific way to play customs and DLC songs together, you can do that from day 1 and there is nothing you need to do to do that. The reason you need 2 sticks is that you want one stick with your official account that can go online, its cache, its savegame (which is not compatible with the TU4 savegame), etc. and one with your customs account. All DLC goes on the hard disk. If you have ever read a single line about how to play customs you know how to play customs and DLC on the same console.
If you don't need to ever go online or use TU5 ever again you can use one stick, the logic is the same. There is no scenario in which you have songs on 2 sticks, there never was. That's why I asked "What part of the video that explains it is not clear?" The video is pinned and titled "TUTORIAL - Playing Custom Songs (Video)", so it's impossible to miss, unless you believe that your spending 5 minutes to check the forums is more valuable than someone else doing so. Which unfortunately is what some people think, and we know that because they literally told us so.
It's not difficult to understand: nobody here is paid to do support. You don't buy a product that entitles you to some work on our part. Yet you can find literally all you need to play customs and even to author them because people gave up an insane amount of personal time to compile docs and help the community. If anyone is too lazy to look for the content it's fine, it's their prerogative. What is not their prerogative is insulting people, for which anyone will get a ban.
What some people don't get (not referring to you of course, I'm saying this in general) is that a community that releases more than 10,000 pieces of UGC that in large part require 10+ hours of work per item does not simply spring up. It takes effort, planning and philosophy. That philosophy is simple: if you are one of the creators you get praises, love and appreciation; if you are one of the users you get a ton of high quality free content but you need to feed the creators. That balance has allowed us to sustain a community of great people. We can't let anyone ignore this basic principle otherwise the whole system collapses. Can you be bothered checking the forums for 20 minutes before posting? If so, great. If not, we will still welcome you but you're gonna be responsible for your own shortcomings. Do you have the time to properly learn how to author? If so, great, we have hours and hours of tutorials. If not, we will still welcome you but you're gonna be responsible for your own shortcomings.