Re: Cikira RV
You may have just told us why your not getting any warranty support. If your parents bought it and titled it in their names, then gave or sold it to you, your the SECOND owner. NO manufactures warranty extends to the second owner in the RV world.
Not having heard of Cikira before, I will bet it is a small company and probably not the best trailer made, but maintence has to be done on all of them. I have seen top companies say: "Sorry, no owner maintaince" In this day and time, we hear it more and more.
In your first video, you show the rear roof seal. That looks orginial to me. After 4 years, it looks like I would expect it to look. The front roof seal, where the front filon comes into the roof, looks like it has clear silicone on it. That is NOT the correct sealant to use with EPDM roofing. Needs to be a Self Leveling sealant that you can get at any dealer. NOT Wal-Mart! All that has been put down the front is clear silicone, again should have been a better sealant.
Like Hollis says, I wish you good luck, but your trailer has mold, mildew and rot in it. It will be a miracle to save it now.