My wife's from the Philippines. Been over there six times. My in-laws live in a rural area. Lots of free-hand milling just like that. Guys with big Stihls. Never saw any other brand.
One visit I watched a couple of guys with an ancient Stihl (loud as he'll) drop an 18-20" acacia and turn it into a 10-12' canoe hull in a day. After it dries out they'll add bamboo outriggers and paint it. Ready for hand line fishing. Amazing DIY skill with nary a thought of safety.
You want some fresh coconuts from your tree? Pay a local teenager 30-40 pesos to free climb 30, 40, 50' up there to kick a few lose. For a few more pesos he'll hack it open for you with his ancient machete while holding the coconut with his sandals foot. Green coconut water is awesome on a hot day, and that's the only kind of day there is in the Philippines.