Well, in the first case, as someone else has said, you are asking people why it doesn't work, rather than how to do it. In the second case, your question is very broad. You don't mention music at all, and you don't mention what aspect of music you are wanting to learn. Some things work better than others. So, narrow the focus of your question and be more specific. For example:
Do you feel that learning to play the tuba using video chat can be
effective?
Edit: Ok, now I've seen the original that spawned this meta-question. Yes, you do talk about music. You also come across as a particularly unpopular schoolteacher, first pontificating on your own ideas, then didactically telling everyone what rules we must follow if we are to be permitted to involve ourselves in answering your question. Your sarcastic comments to the moderators are based on the idea that the only reason that they are blocking your question is that they are too obtuse to understand it without your "clarifications".
So, I revise my answer thus: start with an attitude adjustment. Once you have adjusted your attitude sufficiently to not care whether or not anyone who is giving advice and suggestions is "really" attacking you, try looking at the suggestions given. Then, try asking the question over again.
migrated to meta.music.stackexchange.com by Shevliaskovic, Meaningful Username, Fergus, American Luke, Dom 43 mins ago
. Or did some mod migrate it after we flagged it? – Shevliaskovic Apr 30 '14 at 21:34