Identify h264 profile and level from profile-level-id in sdp?

For such things you should read actual H.264 spec not Wikipedia. Using it you can parse your example as

• profile_idc 0x42 == 66 so it is Baseline profile
• profile-iop 0x80 mean constraint_set0_flag=1 (so it is Constrained Baseline profile) and others 0
• level-idc 0x14 == 20 so it is Level 2.0

So result is Constrained Baseline profile Level 2.0