Y'all (except Jacob) are missing the fact that "Unclear what you are asking" means not only literally "is unclear what your question is" but also means "is impossible to solve your problem with the amount of information provided". This is the complete usage of the close reason as explained by Stack Exchange Community Manager Shog9:
##There are three types of questions:
- Those that clearly state a specific problem and provide sufficient information for knowledgeable answerers to identify a solution.
- Those that fail to state a specific problem, but provide sufficient contextual information for knowlegeable answerers to guess at both a problem and a solution.
- Those that fail to identify either a problem, a context, or a desired outcome.
Only #1 is not "unclear"! #2 could be edited by any sufficiently-skilled person to make it clear. #3 requires input from either the author or a psychic to become clear. Therefore...
Barring the intervention of an editor, #2 and #3 should be closed as "unclear what you're asking."
So, the question you refer to are of the mix of #2 and #3 (is that even possible?), they identify the problem and what they want to accomplish, but lack the required information to give a concise and precise answer.
Answering a question shouldn't be a guessing game. That lowers the total quality of the site and shuns experts.
Now the specific example:
I tried VLC, KM player and Movie player as well. None of them work.
Movie player shows error. VLC and KM player do nothing. Whats the solution?
I use Ubuntu 12.04. Please explain elaborately.
"Movie player shows error" why in the world you don't post the error message as well? I can phantom several, thousands of errors from "file not found" to "segfault (core dumped)" and each of them would have their specific solution. I wouldn't write an answer without being at least 99% sure it would totally solve the problem as written, the probabilities that it could are the same that it could not. So, at the end of the day, nobody would be sure what exactly solves the problem as posed in the question as any answer would do.