I know this forum is on web design, but why not do “design” and then use a content management system to manage the content on your site? This allows to update, change and remove content through a web browser using an interface that is extremely user friendly without having to learn or use code.
A content management system can get updated to reflect code changes and new features, security and otherwise. You can often easily trim down all of the features a CMS offers so that features it contains, but is not pertinent to your goal, is hidden. You don’t have to worry about browser compatibility or making your site viewable to those with disabilities. You can also easily create user accounts so that you can delegate site tasks without giving up control of the site. You can still add flash elements if need be. You can still easily embed Quicktimes or other flavors of videos. You can easily change the layout and theme of your site without having to code. You can schedule content to appear and come down ahead of time. Oh, and many excellent ones are free.
I can’t tell you how many people have had me build them a site. I have struggled with not wanting to charge a lot, yet often there are ongoing and demanding requirements by them, many of which are about timely or immediate updates. A CMS is great to enable non technical people to manage web sites. I can go on for days about them, but it might be best to check some out for yourself.
https://drupal.org/
https://www.geeklog.net/
https://www.joomla.org/
https://www.mambo-foundation.org/
https://www.phpnuke.org/
https://www.phpwcms.de/
https://phpwebsite.appstate.edu/
https://www.postnuke.com/
https://siteframe.org/
https://www.typo3.com/
https://www.xoops.org/
My current favorite is Mambo. The preceding are open source and free. They all have active communities which can provide help via message boards. If you pay for web hosting, inquire about Cpanel with Fantastico. Fantastico will let you auto install any of the above and lots, lots more with a couple of clicks. Fantastico also provides simple click to upgrade when your CMS starts to age. And web hosting that includes Cpanel and Fantastico usually isn’t any more expensive than web hosting without.
Anyway, just my 2 cents…
-Mike