I couldn't watch all of that channel 4 video, I got to the bit where he received an email from a "hacker" and had to turn off.
"Anti-Virus" software on Android isn't really necessary, the best way to be safe is by being careful of what you install, only installing from trusted sources and checking the permissions of apps before you install. It's also not advisable to go clicking links in emails where you can't be sure who sent it to you (the same as with a PC, which is why that channel 4 thing got on my nerves). There's an excellent post by alostpacket here:
http://androidforums.com/android-ap...ps-avoid-viruses-guide-those-new-android.html
Yet another article and in the end truth is nobody has the last word...or as the person who posted that article put it:
"Also, while this guide attempts to be as comprehensive as possible, there may be errors or misjudgments, or just opinions that are subjective. Please read it with the idea in mind that it's just a part of the information you may want to consider when downloading your apps. "