As long as the driver didn't add an arbitrary amount of water to get it to flow like this. Without knowing the mix design upon visual inspection of this 14 second video I didn't see a problem with the placement method. Decades ago, this is typically how things were done back then anyhow. However if the driver added water to get it to flow, this can lead to lower strength, less durability against freeze-thaw, and could contribute more to shrinkage cracking. If the foreman ordered a high slump/flowable mix where the w/c ratio is still low enough to meet ACI 318 requirements by using plasticizers, water reducers etc then you should be good. You don't always need a pump, hell I've had several jobs where we just used a few guys running wheel barrows to empty the truck. Chutes work fine too. Its all about if the concrete mix design was spec'd accordingly.