Video by Brent McCluskey — Electrified Reviews via YouTube
Source
DYU D3F written review: https://www.electrifiedreviews.com/blog/dyu-d3f-review-469-mini-e-bike-you-can-pack-anywhere
DYU D3F website: https://us.dyucycle.com/products/dyu-small-electric-bike-d3f