Lotsa neat old primarily English bikes, with single-cylinder machines well represented. I like one-lungers. The longer-stroke models fire at about every telephone pole.
From about 42 to 47 seconds in is a very unusual motorcycle with a very distinctive sound: A Scott Flying Squirrel 500cc or 600cc twin. I've seen 'em, but I never heard one run before. Now I know why they call 'em "the yowling two-stroke"! More at the Scott Owners' Club or Wikipedia.
Please enjoy this. I did.