Usually, everything above 3% of the views purchasing your gig is great. Everything above 5% is awesome, what goes above 10% is phenomenal. Maybe, you should try changing your gig description or proofread the one that you have. Make sure to use great gig photos. I have never used a video for my gigs, but I do think that it might be helpful.
Invest in your skills, a lot of books, a new faster computer, go on courses about business, communication, negotiations and such. Preferably, you can read “My Grammar and Me (Or Should That Be I)”, it’s a great book that helps you improve your grammar and style during your communication in English, it has helped me a lot.
IN SHORT: Invest in your skills, update your gigs with decent extras, optimize your packages.