Nokia Video Trimmer is able to trim all clips captured with your Lumia device. Commonly these are H.264 with an .mp4 container. You can't trim a video which you have downloaded from web. Most likely it probably is not in the right format.
- I cannot get a mobile network signal on my Lumia phone
- My phone does not charge
- How can I recover/reset/restore my phone software?
- What to check if I can't add or create the Microsoft account on my Lumia phone during the initial setup?
- How can I unlock my phone so I can use another network operator’s SIM card?