If you want to put your video files online using HTML5 then it's recommended to have three different formats for a full browser support. Those formats are mp4, ogv and webm.
Remember as a kid you played with a mirror, putting your face to the side of it and your friends were laughing at the funny symmetry of your face and your faces reflection?
If you are getting a vast number of email notifications sent by your Twitter account and they started to annoy you, this is how you disable and manage them.
You can easily copy any text on a website and then paste it to anywhere you like on your iPhone or iPad iOS powered device. I will show you on a website to email example.
If you are a heavy twitter use, possibly with more then one account, than I suggest you to give Tweetdeck a try. You can arrange, schedule, monitor and manage your tweets with ease.
The new Apple iPhone 5S comes with a touch sensitive finger print reading home button that enables you to unlock your phone or authorize buying apps by simply putting your finger on it.