I'll try to explain.
1) He does indeed use both, but he is using this as a method of emphasis for the clause after "but". If I were to write it down, I would put the "even though" clause between parentheses to show that it is a clause of non-essential information. These kind of "seemingly wrong" colloqualisms are quite common amongst native speakers. A very common mistake you might here that is a definite error in textbook english is something like "there's lots of stars in the sky tonight", whereby the speaker is naturally saying "there is" when it should be "there are".
2) I don't here the "L" sound, but I do hear an aspirated connection between the W and the I. "saW It" is kind of flowing into each other too much and the words are not distinctly pronounced. This affliction on the "W" sound specifically is a somewhat common speech impediment in English speakers.
3) I do hear the "T" sound at the end, and this is simply a mistake (not sure if intentional or not, but it's certainly not correct).