Why does my video have such bad video quality?

I uploaded my video to the computer and it had great video quality, then I uploaded it to Facebook and YouTube and It looked horrible. It there anything I can do to change that? Save it a different way or something? I see all these YouTube videos that have been filmed by iPhone's and they have great quality. Shouldn't my 14mp camera have even better!

I'm not sure and don't rely care but thanks for the 4 points

I think you may had forgot sum setting abt resolution while u upload your vedio

Q: Why does my video have such bad video quality?
A: Because you don't know what you're doing.

  • Why is my video quality bad? I recorded a video with my front camera (iPhone 5s) which is pretty good quality, on Final Cut Pro x I shared via Youtube settings, straight to my channel. 720p, 700mbs, when I view the video, its kinda blurry, why is this? How do I fix it
  • Why does the video quality look bad when uploaded to the computer? [iPhone 4]? When I upload my video to youtube in HD directly from the iphone, I go on the computer to watch it on youtube and the quality is perfectly normal. But when I copy the file from my iphone and onto my computer the video looks grainy? I wan't to put it into after effects and do some editing but how can I go about KEEPING the quality of the video? I don't get why it gets all grainy when I put it onto my computer vs. It being perfect when I upload it directly from my ipod to youtube?
  • Why does the FBI have such a hard time cracking iPhone encryption. Why don't they just use the spy agencie's methods of using spyware? All you need is their phone number, and a cheap piece of software and you have access to everything on the phone (including deleted info) Why make a huge scene about it, when there are much easier ways to bypass lock screen encryption? You don't even need access to the phone, it can remotely install with just one phone call to the number too… Just saying, if the FBI really wanted in, it would be very easy
  • Why does my laptop get such bad internet download speed while my Iphone gets 10 times more? My router is downstairs connected to a Windows vista PC. That PC connected with an ethernet cable gets around 90-100Mbs download speed. I did another speed test on my iphone upstairs next to my laptop, and it got 80-90 Mbs. But When I did the speed test on my laptop, it was only 10Mbs down. It's really annoying because it takes like a billion years to open youtube and everything lags.