So you are running on LS 5.2.5. I am pretty sure that you can edit questions and if you can edit your questions, you can edit the answers there as well, how else did you put your answer options in the first place?
However, from what I understand, you don't want to edit answers, but you rather want to put conditions.
Limesurvey does not have "jumps", so you can't tell Limesurvey to jump to a specific questions when respondents have given a certain answer. Limesurvey follows a different philosophy, which is quite flexible, but requires a little bit more work.
What you need to do in your example for example, is hide question 7, if the answer in 6 was "no". You can do this either by adding conditions via the interface, but I honestly rather suggest to get the basic idea of expression manager and relevance equations.
For each question and question group, you have a field for "relevance equations", where you can define in which cases this question/group is shown.
Let's say in your question 6 has the question code Q6 the answer options are "Yes" (1) and "No" (2).
So in the relevance equation of Q7 you would write something like:
[code]Q6==1[/quote]
This means that Q7 is only shown if the response in Q6 was "1" or Yes. If it was No, this equation isn't true and the question Q7 will not be shown.
Secondly is it possible to insert pictures directly, I have inserted a link, but the picture dosen't show at all in the question preciew.
Or would it even to possible to insert a video directly, so participant can watch the video directly at the question page and then answer the question, right now I could only insert a link.
Of course this is possible. You can either do it via the WYSIWYG editor, which I personally would not recommend, I avoid it.
But Limesurvey is pretty much just a "website", so you can use normal HTML code to insert photos or videos, as you would on any other website.
If you just post a link, Limesurvey doesn't know what you want to do with this link. It will just display what you have posted.
You need to use the right HTML code to display the image behind this URL:
www.w3schools.com/html/html_images.asp