It's Flash, Photoshop and probably Premier. Flash will give you the words flashing easily in a timeline, and crisp too. Flash also incorporates audio to get your timing right. Photoshop images imported into Flash will give you the blurry words etc (pixel not Vector). Ideally you would want to import a video made with Photoshop and Flash into Premier - where you can add the audio and any other special effects you want. this way you can export from Premier using the adobe media encoder that creates a quality low file size youtube video - a .wmv. My suggestion is use Flash to create the video (because the vid is txt intensive and Flash is geared for that - it's easy!), and with the audio to get timing right, but ditch the audio in the final Flash video .mov render, cos you'll want to rather add audio in Premier - so you only get a second generation audio output. If you rip direct from Flash you're looking at a .flv, or a .mov, and without the treats available in Premier. My 2 cents