Advice required changing win's based app to webase app

Advice sought I wish to understand how easy it would be for a programmer to change a windows based application into a web based application. My video hyperlink application is a Windows standalone executable and the programmer who created it has said he does not have the time to create a web-based application at this time,however, he has given me permission to make changes as I require. I need to understand the following: How easy would it be for a programmer to make the change from pc based to web based. Timescale/ Cost/ installation My website [login to view URL] The demo- version of the application is attached Gary ## Deliverables All that is required for this project is advice from a coder. My objective : To have my video's on [login to view URL] display hyperlinks ## Platform Currently windows [login to view URL] runs on linux