Yes , 100% you will get better results in comparison to the profile just having text description .
Tips for your video
1. Make it short and brief.
2. Try to give a Intro who you are , what your experience is.
3. What service you will provide , what will be your TAT ( Turn Around Time )
4. How much dedication you will give per client ( Every client is important)
5. End your video with saying Thanks .
Sometime a Intro video of 30 seconds explain better then a video of 30 Minutes .
feel free to ask me if you have any further query.