The video speed class is for sustained write speeds, which are needed for video recording at high bit rates. The card is rated at C10 and UHS 3, the max rating in those classes, because it exceeds the minimum speeds required for those ratings. However, it is rated for only V30 because it is capable of writing only 30 MB/s for extended periods of time.
The advertised 95 MB/s is the max read speed. The burst write speed for the card is 90 MB/s, which can be maintained only for short periods of time.
The SanDisk Extreme Pro SD UHS-I product page states:
Up to 95 MB/s read speed. Write speed up to 90 MB/s. Based on internal testing; performance may be lower depending upon host device. 1MB=1,000,000 bytes. X = 150KB/sec.
UHS Speed Class 3 designates a performance option designed to support 4K UHD video recording with enabled UHS host devices.
UHS Video Speed Class 30 (V30), sustained video capture rate of 30MB/s, designates a performance option designed to support real-time video recording with UHS enabled host devices.
See also Difference between Speed Class, UHS Speed Class, Speed Ratings (performance) and Video Speed Class for SD/SDHC/SDXC cards.