1. Optimize your phone by clearing cache, deleting useless photos, data, etc. (Less effective)
2. Copy Videos from Android to Mac/Win. (Recommended. You can watch it on PC and get lots of space on Android.)
The first solution is recommended when you need the space to download a song or a photo because optimizing phone will only save you a few MBs of storage. If you need a large space, solution 2 will be your best choice. What you need is Android Transfer.
Android Transfer is an excellent video manager and storage manager for Android users. You don't need to say goodbye to any critical files to get space for your Samsung, HTC, Sony, Motorola and more because they can be moved safely to your computer and get them back any time you like. Not only videos can be transferred, contacts, photos, music, apps and text messages are all supported. If you have no idea whether your Android device is supported by this software, just download it on your Mac and give it a try.
With Android Transfer, you can transfer .mp4 and more video formats between Android and Mac. The steps are super simple and save.
At the very beginning, you will be asked to click the download button above to download it on your MacBook or other computer running Mac OS X10.11 and earlier. Launch it after the installation and connect Android device to PC.
Step 2 Transfer Android Videos/Movies to Mac
Then, in the left panel, you will see the supported data types listed. Choose "Videos" and you will see all the videos on your Android device. Tick all those you want to move to Mac and click "Export". When the transfer process ends, you can find these movies in the specified folders on your Mac.
That's it. With two simple steps, you can sync videos from Android phone to Mac. Unlike other method that requires you to locate to the file folder on your Android and choose the videos you like without knowing the time duration, size, format or created date, Android Transfer gives you any details of the videos you might care about before copying them to the computer. Thanks to Android Transfer, you can also transfer contacts between Android and Mac with the similar steps.