Unidentified Vietmamese Flags

Recently there was a short report in TV about the trip of an US war ship to the river that goes to Ho Chi Minh city. The ship was escorted by a Vietnamese war ship (small like a coast guard or so) bearing a flag in the prow, and the national flag in the mast at center (no flag in the stern) The flag in prow was greenish and yellow horizontal (2:1) in proportion c. 2:3 In the green part were an arms, perhaps the national arms, army emblem or other, probably multicoloured
Jaume Ollé,19 November 2003

I'm doing some catching up on editions of "The World" on BBC4 tv which I had recorded. On 4 May 2005, there was a report about Vietnam's economic progress.

Source: BBC

The first image shows some flags? banners? textile ornaments? in a public park. They were simply part of the background 'colour' to the reporter's voice-over, so there was no indication of what they might be.

Source: BBC

These flags appeared during a comment that the 'old guard' still held on to communist symbolism (it was preceded by a shot of a statue of Lenin), though to me this looks more like a shop catering for the tourist trade. There is another of the banners with concentric squares, and a generic hammer and sickle flag (strictly speaking these could be said not to be flags, since they are hung from horizontal pol