Website making/ rebranding with basic features

hi I already have [login to view URL] website where I post IT lectures I am planning to start the work in more professional way . Website is launched on linux need to be in PHP my SQL formate I want to make a full new website with professional features website should be made in a professional secure and effecient way to respond faster I already have new logo designed i will pass you on once we start the work. I need a way to segregate all the videos an playlist option . Ideally I post my lectures on youtube channel and then update on webpage by embedding the link. I also need to put download video option on my page A basic discussion forum for each certifications . Like Cisco , Microsoft , Linux and easy modification . don't need complex one just name and email please send me your wok . I need a secure structure of website . I need no maintained hooks and any unsecured logon on webpage need discussion form that don't need complex login system any one can comment by adding name email , but in comment box I want any one to upload any picture but basics , I also welcome any of your suggestions about it and it want to keep two discussion forms separate for each vendor certification like Cisco and Microsoft . I need another procedure to update my lectures list under some specific admin login process. as you suggested back end application I Also need to keep nice placement of google Adverts on my page Want to add download link for you tube videos from my webpage and one final document that explains any user having permissions on DB and webserver In short i need website make over with good structural approach .