"Firstly I'd like to say that people should not take my comments out of context."
Sorry, your previous posts (particularly the first) didn't explicitly state you had problems because of the lack of File sharing support of the stock Videos app and not because iTunes refused to sync videos already existing in your Movies tab to your iPad. As 99,99% of the iTunes video synchronization problems arise because of the too high H.264 level, I thought the latter was the case here too. BTW, so did most other people that answered your first question by asking whether it's a compatible format (MP4 / MOV/ M4V), that is, ones that can at all put in the "Movies" tab of iTunes.
"Secondly, I was the one who found a solution to my own problem, nobody else did."
See above - you should have asked "how do I tell iTunes to sync my videos to my iPad" instead. Then, we would have told you to go to the "Movies" tab instead of asking whether your videos are at all compatible with Videos (we, rightfully, assumed you had an incompatible video). It wasn't just me that thought you had problems because of the incompatible (H.264 level) videos - again, see my previous answer.
"That said, yes I have removed Flex Player as it did 'crash' on one video (not the others however..) I have now, as suggested, installed QQPlayerHD, which seems fine and also has the File Sharing system (mentioned in my previous postings). This, not because it's a free app, I don't care about the money. I need solutions."
Sorry, I just wanted to help and in no way meant you surely chose Flex only because it's free. You haven't stated why you've selected just flex:player; hence, I thought it was it being free. After all, there are a lot of cicrumstances only free apps can be used (e.g., large enterprises with tons of iPads), this is why they, at least at first, go for free apps. This is why I recommended a free alternative.
"Bear in mind I am not a IT expert, and I expect that a forum such as this provides logical advice, which I am sure is welcomed by many people like me. As a 'novice' I'm more than happy to help when I can."
Again: no offense meant. While I do know you tried to help others, I just wanted to warn people NOT to go for flex:player because it's one of the worst players around. This is why I posted a recommendation for a much better player.