Samsung a7000 can't use keep video.

There are many ways for Samsung mobile phones to download videos. You can do the following:

1. Use your browser to search for the video you need to download.

2. Use a third-party video player to search for the required video download.

3. Download the video from the computer, then connect the mobile phone to the computer and transmit the video from the computer to the mobile phone.

Tip: Because the video formats supported by the mobile phone are different, please confirm the video formats supported by the mobile phone before downloading, so as not to watch the downloaded video normally.