To be in control of an economy you need to be acting in ways that cultivate that control and encourage it to grow. Unfortunately the Tory focus for at least the last 5 years has been on lining their pockets and those of their mates regardless of the impact on the economy.
At about 1m40 it says "erratic policy is hampering Britain's already ailing manufacturing industries" which doesn't really seem to be backed up. Especially since the UK overtook France this week to become the 8th largest manufacturer in the world.
The economy is on its arse for sure but this piece seemed to want to tell a specific story regardless of the nuances/facts.
E: if you read through the comment section on YouTube there are loads of other issues/inaccuracies being called out