Ahh.... I was in a similar position you were. I told my wife "of course its easy in the video's"
1.) My wife and I used an entire bottle (the small one) of the tire wet.
2.) Make sure the angled cuts at the beginning of the hose are fairly long. When she started the hose in the pipe it went in fairly easily.
3.) Once you start pulling and have the tube moving DO NOT STOP. Make sure that someone is feeding/lubing it from the bottom as it goes in.
4.) I had green and purple bruises on my thighs the next morning from bracing against the frame... I also wrapped the rope around an impact socket extension to pull on as it was easier on my hands. All told from beginning to end it took us roughly 3 hours..
Probably the worst part was doing the second tube and getting it all the way to the end of the tube and have the plug let go. We had to pull it out the front again and redo it.
John