Jquery and Flash with iphone

Video formats supported: H.264 video up to 720p, 30 frames per second, Main Profile level 3.1 with AAC-LC audio up to 160 Kbps, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats; MPEG-4 video, up to 2.5 Mbps, 640 by 480 pixels, 30 frames per second, Simple Profile with AAC-LC audio up to 160 Kbps per channel, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats; Motion JPEG (M-JPEG) up to 35 Mbps, 1280 by 720 pixels, 30 frames per second, audio in ulaw, PCM stereo audio in .avi file format
MacBook Pro

jQuery - yes. There is even a jQuery mobile specially for mobile devices http://jquerymobile.com/
Flash - No.
YouTube - yes. Videos uploaded to YouTube are automatically converted to H.264 format for playback on iOS and other mobile devices.
iMac 20", MacBook, Time Capsule, Airport Express, AppleTV 2 Mac OS X (10.6.5) iPhone 3GS 32GB, iPad WiFi 32GB