[Tom Scott]

Try the corner pin effect.

[Tom Scott]

You could use your existing video. All you’d need is time remapping, and a whole lot of keyframes (one for each event in the “PowerPoint”). Drag the keyframes into sync with the speaker.

[Tom Scott]

Add my vote for the puppet tool.

[Tom Scott]

Although best results would come out of a 3D program, it can be done in AE.
See if you can modify this tutorial for your needs.

[Tom Scott]

There are also a number of plugins available (ToonIt is one).

[Tom Scott]

Have U tried re-installing AE?

[Tom Scott]

I’m with Jon on this one. There’s a lot more to getting a film look than just using a 24P frame rate.