Hey dude,
We're always happy to help with questions like this, but the way you multi-post the same question and and then disagree with the answer after it's been provided by experts of this field several times, it's kind of upsetting for a lot of people here. And I don't think thalbergmad's going to be replying to this post again at this point.
I'm providing a link to the 'Maple Leaf Rag' on youtube:
Please go to 0:42 on that video and you will hear the second theme to that song, which is, in fact, what Lord is playing on the video. It may be difficult to recognize the way Lord is playing it because he is improvising, but it is that Joplin beyond the shadow of any doubt.
The breakdown for other parts of the video are as follows:
6:45: Beethoven - Fur Elise
7:40: Nothing, just rock improvisations
8:02: Joplin - Maple Leaf (the 2nd theme)
8:16: Mozart - Eine Kleine Nachmusik
8:32: 'Shave and a Haircut', played three times
Hopefully this answers your questions about the video, if not, whatever you post next about it will probably be met with more insults or just be ignored, I'm sorry to say.
Have an excellent day!