Continued the country-by-country pass against the CI failed-channel
report. Verified every replacement URL with curl before applying.
Also fixed a malformed nested-bracket markdown link in belarus.md.
China: 10, Portugal: 5 (+2 duplicates removed), Poland: 6,
Korea: 2, Albania: 3, Australia: 4, Belarus: 3,
Bosnia and Herzegovina: 1, Iraq: 3, North Macedonia: 2,
Canada: 3, India: 1, Taiwan: 3, Chile: 1, Sweden: 1
Cross-checked against iptv-org's maintained playlists (26 channels
fixed across the five files). Channels without a matching current
source remain marked invalid.