Provide a clear example of a similar job you have done in the past.
Hi. I have created a few videos for different apps/companies. I have samples on my profile page and I can provide some examples of previous work I have done.
Proposal:
Hi! It would be an honor for you to select me to work on your video. I have worked on video editing for a couple years now, and I think that I would be a good selection for your job! I have some samples on my profile, or you can ask me for some of my previous work and I will be glad to share it with you! Please feel free to contact me via my profile for work or if you would like to ask me any further questions! Thank you!