i created an animated presentation with the Sozi plugin for Inkscape. It looks great, however, not all browsers support SVG animations (Chrome for instance does not like the Ink
What you ask is impossible, because SVG animation is interpolated, whereas the major video formats are all frame-based. If you want to render to video, you have to separate out discrete frames.
If you expect your users will view the video at the same speed (as opposed to slowing it down), it is good enough to pick a frame-rate high enough to display the animation smoothly (say 30 fps). The disadvantage is of course increased file size.
Convert animated SVG to movie provides several options for splitting and converting.
Incidentally, Chrome does support SVG animation. Have you tried it in a recent version? Also, try exporting your file from Inkscape as a "plain SVG" (instead of the default "Inkscape SVG"), which strips Inkscape-specific elements that could potentially confuse browsers.