The one guy in particular has some speech problems. He changes what he's going to say, falters, and goes on again. He's not speaking with the best grammar. I'm sure I made mistakes in first line, I just could listen too close because he's garbled. Not sure about name said (Alvin? can't really hear well) Gist is easy, but the garbled wording makes it hard to transcribe.

Meshed really well: got along well together, compatible personalities, not conflicting.

Getting hurt: dirt track bikers crash.

Defend? probably racing titles/record/wins.

"Its got to look good!" its an imperative, must do this! Can not look shabby, like a loser. Got to look on form, top notch. Got to look like a winner.

The pro circuit is like an organized series of top level competitions, with commercial sponsors, in whatever sport is being talked about, pro circuit racing, or other sports competitions.


"lot of wear and tear: sounds like a set phrase, is it?" Yes, 'wear and tear' is a set phrase.

"And another one on the previous video:
The Roller, can it be just another word for "chain",..." I believe he's talking about the chain tensioner roller, it is somewhat obscured by the bike frame in the video view. The tensioner roller is slightly behind the front sprocket, underneath the lower section of chain. It keeps the chain from getting loose, prevents it from hanging down. This prevents it (the chain) from various high speed disasters, like coming off the sprocket. This one needs to be cleaned from the crud/dirty lube build up (or built up, two different tenses) on the dirt track, or that could cause a disaster too. So it makes sense to me that he is specifying the roller itself, as well as the chain, for cleaning.