From a list to a Slider

[MrOnno]

Hiii,
I've a massive list with video links i want to insert into a slider.
But all my work so far failed. (I am a amateur)
I need a slider with a left and right button, and 4 links in the middle with every press on the arrow buttons it moves 1 spot!
Can someone please help me out?
This is what is got so far..
(that is part of the list)

<div id="videoslider"> <ul> <li> <a href="/interviews/0PwoqVl9G6c/vince-kidd-interview/"> <img src="http://img.youtube.com/vi/0PwoqVl9G6c/2.jpg" title="Vince Kidd Interview" alt="" class="image1" style="opacity: 0.7;"> </a> </li> <li> </li> <li> <a href="/interviews/kLPjYopwkGg/adamski-interview/"> <img src="http://img.youtube.com/vi/kLPjYopwkGg/2.jpg" title="Adamski Interview" alt="" class="image1" style="opacity: 0.7;"> </a> </li> <li> <a href="/interviews/HJ1emv8QBq8/crissy-criss-interview/"> <img src="http://img.youtube.com/vi/HJ1emv8QBq8/2.jpg" title="Crissy Criss Interview" alt="" class="image1" style="opacity: 0.7;"> </a> </li> <li> <a href="/interviews/1covAsX9w1g/paigey-cakey-interview/"> <img src="http://img.youtube.com/vi/1covAsX9w1g/2.jpg" title="Paigey Cakey Interview" alt="" class="image1" style="opacity: 0.7;"> </a> </li> <li> <a href="/interviews/AMpfapgmtS4/micall-parknsun/"> <img src="http://img.youtube.com/vi/AMpfapgmtS4/2.jpg" title="Micall Parknsun" alt="" class="image1" style="opacity: 0.7;"> </a> </li> <li> <a href="/interviews/oU1gq9cP1xU/barney-artist/"> <img src="http://img.youtube.com/vi/oU1gq9cP1xU/2.jpg" title="Barney Artist" alt="" class="image1" style="opacity: 0.7;"> </a> </li> <li> <a href="/interviews/bpkZMFs5vo8/akala-interview/"> <img src="http://img.youtube.com/vi/bpkZMFs5vo8/2.jpg" title="Akala Interview" alt="" class="image1" style="opacity: 0.7;"> </a> </li> <li> <a href="/interviews/nS8Ef--4Oq0/dj-day-/"> <img src="http://img.youtube.com/vi/nS8Ef--4Oq0/2.jpg" title="DJ Day " alt="" class="image1" style="opacity: 0.7;"> </a> </li> <li> <a href="/interviews/l0PrrbOEfJA/mic-righteous-interview/"> <img src="http://img.youtube.com/vi/l0PrrbOEfJA/2.jpg" title="Mic Righteous Interview" alt="" class="image1" style="opacity: 0.7;"> </a> </li> <li> <a href="/interviews/QjLSOjtS7Bc/mk1-interview/"> <img src="http://img.youtube.com/vi/QjLSOjtS7Bc/2.jpg" title="MK1 Interview" alt="" class="image1" style="opacity: 0.7;"> </a> </li> <li> <a href="/interviews/UBFdHCyKgp0/iggy-azalea-interview/"> <img src="http://img.youtube.com/vi/UBFdHCyKgp0/2.jpg" title="Iggy Azalea Interview" alt="" class="image1" style="opacity: 0.7;"> </a> </li> <li> <a href="/interviews/rFjGB4GMJFA/booty-luv-interview/"> <img src="http://img.youtube.com/vi/rFjGB4GMJFA/2.jpg" title="Booty Luv Interview" alt="" class="image1" style="opacity: 0.7;"> </a> </li> <li> <a href="/interviews/qe6QAiwyU0c/paul-hardcastle-interview/"> <img src="http://img.youtube.com/vi/qe6QAiwyU0c/2.jpg" title="Paul Hardcastle Interview" alt="" class="image1" style="opacity: 0.7;"> </a> </li>