RateTheRef

First caution is stopping a promising attack so mandatory caution, especially at that level.  Ditto second caution, once a foul is given it can only be a caution and red.

Away 12 caution, he has clearly said something so been cautioned for dissent (no sin bin at this level).  Likewise away 15 seems to be dissent.

Foul on away 15.  Possible contact, but he has gone down very easily and was definitely looking for it.  Same really for his second caution, there may have been a tiny bit of contact but he has then flung himself down very dramatically.  Perhaps him being an ex-Premier League player means he has learned the dark arts but referees at this level are less likely to fall for it or turn a blind eye.

I'm really struggling to see the cause of the penalty, the attacker just seems to fall over then the defender falls on top of him.  There's a possible arm on his back, but he was already almost on his knees by that point.

Something that a lot of people in football don't understand, backed up by the comments on the video, is that when a player is fouled when moving into space it has to be a caution for stopping a promising attack.  It doesn't matter if the foul was "soft" or was totally accidental, it can only be a caution.