What's the best way to approach a "sneak peak" before it goes into the actual video?

[default9vvcyoqmh88r]

I'm refering to an 45 second attention grabber/highlights before launching into a 20 minute talking heads video. I've already cut the couple little snipbits that I want in the highlight video, but I'm not sure exactly how to approach it so it's regonizable as something along the lines of "what's ahead." Transitions? Graphics? I don't want it to be over-the-top...I'm probably overthinking this. 

[RobShultz]

Text?

[Peru Bob]

I think 45 seconds is too long for a 20 minute video.  20-30 seconds would be better in my opinion.

Perhaps a text Mogert would work for you as suggested by RobShultz  

Maybe add some appropriate audio.