Preferable platform for video-editing and viewing - Executable program / Web-based?
I eventually developed a web-app - HTML5 & CSS. Developing a GUI in HTML is a breeze. And the Chromium (Open-source Google Chrome) handles HTML5  pretty well.
Unlike what people have said here, it is not heavy.
I need to make a light-weight application for video editing and viewing.
I was thinking of either writing an executable program written in Python, or a light-weight web app using JavaScript and HTML5. Flash, as a third option, is pretty much out of the question, since it's too fat and has many security flaws.
EDIT: The video serving itself (read: the "heavy-weight stuff")  will be done by a dedicated fast library or service. Thus, the Python/Web-app questions is pretty much related only to the GUI and some very basic video manipulation, like jumping to a specific frame and such.
What is the preferable platform, considering speed and ease of use (for the user)? Should I just use Python, or maybe just build a small web-app for my task?
Thanks in advace,
Ory