I found them they are on youtube.com onlinechesslessons.net channel.

GM Damien Lemos also recommends 4.Nf3 Bxc3 in his DVDs on the Nimzo and Bogo

bragesjo wrote on 06/21/13 at 15:29:11:


4.Nc3 Bxc3 is pretty weird. Why not transpose into a Nimzo-Indian with 4...c5 or something?

Today I discovered Andrew Martins Chessbase DVD ABC of the Bogo Indian.

1 d4 Nf6 2 c4 e6 3 Nf3 Bb4+

Having watched the introduction chapters and parts of some other chapters I say this is a typical Martin DVD = more explanations and enthusiasm than concerete moves. So if you like a Martins disc you like this one.

The first part of the DVD covers typical ideas and pawn structures he shows 7 games.

After that there is a repertour section.

After 4 Bd2 he recommends two different options, the dynamical c5 and the solid Bxd2+.
Each choice is covered with 6 games and a conclusion.
The funny thing is that the Bxd2+ section the first game is Aronian-Carlsen and the other games are Ulf Andersson games 

After 4 Nd2 he recommends either d5 or b6. d5 is covered with 5 games and a conclusion and b6 is covered with 4 game and a conclusion.

The most intresting part is that after 4 Nc3 he recommends the provocative Bxc3+ that is covered with 4 games and a conclusion.