I'm on a tablet at the moment, so I'm not going to download the file right now.
There are three tools that can help, they're all cross-platform. You do need to be discriminating about where you download them from, only download from the developers' sites, and only click on the actual links you want!
MediaInfo - will analyze your file, and give you more info about what format it is. Select one of the advanced views to see all details! The Mac App Store version has a small fee, but there is a free download on the site, too.
VLC Media Player - will play about anything, using the versatile ffmpeg library.
Handbrake - will convert to a vanilla MP4, using the best MP4 encoder out there.
AVC is a container format for h.264/MP4 encoded video. The three file specs are closely related, but, some manufacturers give them a bit of a tweak, as they are open specs.
These are three great tools I use all the time...
From the upper left corner of the U.S.
Photos, Video & Pano r us.
College and workshop instructor in video and audio.
70D, Sigma 8mm, Tokina f2.8 11-16, Canon EF-S f2.8 17-55, Sigma f2.8 50-150 EX OS, Tamron 150-600VC. Gigapan Epic Pro, Nodal Ninja 5 & R10.