A modern feature that should be included. Sound and moving picture can add a lot to observation.
I donāt think itās worth the cost especially as you can easily link to youtube for example (which iāve been doing). Also, Iāve seen what happens on social media where people post excess videos for identification that donāt offer any advantages over photos. Many people find it easier to record a video than try to focus an image. But in most cases photos would have been more informative as they offer more resolution and usually have better focus. With small creatures like insects itās also often a headache to look through a video trying to find a frame in focus when identifying.
For what itās worth, eBird/Macaulay Library are expanding support for upload of video of non-bird animals if you want a citizen science platform to submit video observation evidence to.
Macaulay Library/eBird video recording and uploading guide: FAQs
Uploading media at the checklist level: Other Animals