Maxwell Bresee’s review published on Letterboxd:
The VCD cut (The only one available) for some reason omits original footage shot by Tsuburaya featuring the actors from Jumborg Ace (the show) featured in the Thai theatrical version. Portions of it were included in a Japanese Laserdisc set in the 90s. Chaiyo clearly has the theatrical version on-hand since a snippet of it appears as an extra on the Hanuman vs. 7 Ultraman DVD.
Here's a decent edit of what Japanese-cooperated footage (The stuff with Giant's backstory seems to have been exclusively Chaiyo's work) exists spliced with episodes 48 and 50 of the show, which this movie seems to draw heavily from: www.youtube.com/watch?v=U1biOCOwGl4
I wish Chaiyo would focus on giving us decent releases of their original works instead of making cringe-worthy Ultraman social media pages.