1.zippyshare has a limit of 200mb and this file is 518mb big which means if you want it to be uploaded in zippy the file has to split in 3 parts and then uploaded and that would require a third party software or app(in case of mobile phones) to extract and join them.
2.mega and zippy they both are easy and free to use and I think both of them are not even blocked in any country.
3.mega also has a cloud storage which means uploader can save that video in the cloud for later requirements.
4.uploading in zippy means splitting files which again takes some time compare to no time in mega(only talking about splitting here) uploaders usually wanna share and get over with.(why would someone go for more tedious methods when easier options are available).
these are the reasons according to me why most of prefer mega over zippy.
I use 4 years old android phone with 1gb ram with 8gb internal memory and mega app seems to work just fine.