There are many programming tutorial channels in Hindi already. You need to have some kind of variety to make it big. You can either make your videos more eyecandyish by improving your editing skills. Nobody is going to watch another channel where someone speak with a low quality mike with a screen recorder video of you typing code playing in the background. Make the videos short and quickly teach the concepts to the viewer. Focus on skills that gib jobs, like Asp.net, Android programming, terminal commands, administration, databases commands, etc... the thing is to focus on making videos that will give practical skills and cover the latest trends in the job market. Everyone who is going to watch your videos already knows the basics of Java, C, etc... already. If you are focusing on basics then make videos about niche languages like Haskell, Forth, etc... Maybe some theoretical videos might be nice too.