The htmlawed rules have already been adjusted again in the latest SVN releases of izap_videos. In the meantime you can easily adjust the settings by modifying line 75 of izap's start.php. I use

$CONFIG->htmlawed_config['elements'] = 'object, embed, param, b, i, ul, li, u, img, alt, a, blockquote, span, style, p, strong, em, s, ol, br';

instead.

I reloaded izap videos 3.6.1b and everything returned to normal. All html from past files remained. The only ones I had to fix was the ones that were saved when 3.6.2b was active.

For now, we will stick with 3.6.1b until the 3.7 has been updated to included all the latest fixes. It appears they are aware of these problems and it's just a matter of when 3.7.1 is released. We're a user not developer and we have to trust in the developers that bring us their product.